8- Super Mario is attempting to high jump from a pipe on to a set of b.docx
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8. Super Mario is attempting to high jump from a pipe on to a set of bricks at 2.44m. At the instant of takeoff, his vertical velocity is 4.0 m/s and his center of gravity is 1.25m high 4.0 m/s What is Mario\'s vertical acceleration at the instant of takeoff? a. 9.81 m/s (downward) How much time elapses after takeoff until Mario reaches his peak height? b. 0.41 s c. What peak height does Mario\'s center of gravity achieve?P Solution here, h0 = 2.44 m initial vetical velocity , v0 = 4 m/s a) the Mario\'s vertical accelration , g = 9.81 m/s^2 b) the time elapsed , t = v0 /g t = 4 /9.81 = 0.41 s c) the peak height , h = 1.25 + v0^2 /2g h = 1.25 + 4^2 /(2 * 9.81) h = 2.07 m .
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7- (6) Describe the interference pattern produced by light going throu.docx
7. (6) Describe the interference pattern produced by light going through two slits one photon at a time as it might be recorded by photographic film. Discuss how this helps interpret the dual nature of light and how it relates to the wave function of the photon.
Solution
Interference is phenomenon where the rearrangement of light has been done or in other words the
combination of different wave to produce resultant wave. If both the wave are in phase then it will add up and
produce the bright fringe or if they are in different phase then they will cancel each other and lead to prroduce dark fringe.
Initially in ray optics we have considered the light has nature of ray that means light move in straight direction
but when we have seen the phenomenon of interference we come to know that light has small particle known as photon which travels in the form of wave.
That means light has wave nature whcih is othe nature of light.
.
6-14-2018 1159 PM 60-2-100 Gradeboo -Print Calculator Periodic Table Q.docx
6/14/2018 1159 PM 60.2/100 Gradeboo -Print Calculator Periodic Table Question 45 of 55 Sapling Learning Map At 25 ?, how many dissociated OH ions are there in 1 267 mL of an aqueous solution whose pH is 2.08? Number ions O Previous Give Up & View Solution Check Answer Next x to search ?
Solution
use:
pH = -log [H+]
2.08 = -log [H+]
[H+] = 8.318*10^-3 M
use:
[OH-] = Kw/[H+]
Kw is dissociation constant of water whose value is 1.0*10^-14 at 25 oC
[OH-] = (1.0*10^-14)/[H+]
[OH-] = (1.0*10^-14)/(8.318*10^-3)
[OH-] = 1.202*10^-12 M
number of mol of OH- = [OH-] * volume in L
= 1.202*10^-12 M * 1.267 L
= 1.523*10^-12 mol
number of OH- = number of mol * Avogadro’s number
= 1.523*10^-12 mol * 6.022*10^23 ions/mol
= 9.17*10^11 ions
Answer: 9.17*10^11 ions
.
802-11 networks are identified by which of the following- A- Security.docx
802.11 networks are identified by which of the following?
A. Security identifier (SID)
B. Broadcast name
C. Kismet
D. Service set identifier (SSID)
Solution
Answer: D. Service set identifier (SSID)
SSID is nothing but a network name that identifies the wireless networks.
It is a case sensitive and it should be a 32 alphanumeric characters unique number that can be used to pass the header of the packets that are sent over the wireless networks.
Multiple SSID can also be existed. By using Multiple SSID we can connect different networks thorugh a single access point. The network manager will take care of managing different SSIDs over the multiple wireless networks.
.
8- Multiprocessing with a single core processor is ________________- 9.docx
8. Multiprocessing with a single core processor is ________________.
9. The log file records every transaction that requires a ______ access to the file system?
Solution
8.
Multiprocessing with a single core processor is Multitasking .
in single core processor when more then one processes are running together then it is called multitasking and this is accomplished by the use of cpu scheduling techniques like (first come first serve)fcfs,(shortest job first)sjf,(shortest remaining time first)srtf.
9.
The log file records every transaction that requires a direct access to the file system.
log file is the file used to store the log or information about each transaction which can be later used fo file system crashes or reboot or system restore etc
.
8- Identily cach of the following as a strong acid- a weak acid- a bas.docx
8. Identily cach of the following as a strong acid, a weak acid, a basc, a soluble ionic compound, or an insoluble ionic compound in water (a) HNO (c) CH COOH (e) ZnS (f) Fe(NO-):6H O (g) NHs (h)NaCI GNaHCO
Solution
(a) HNO3, Nitric acid - Strong acid
(b) LiOH, Lithium hydroxide - Strong base
(c) CH3COOH, Acetic acid - Weak acid
(d) H2SO4, Sulphuric acid - Strong acid
(e) ZnS, Zinc sulphide - Insoluble ionic compound
(f) Fe(NO3)2.6H2O, Iron(II) nitrate hexahydrate - Soluble ionic compound
(g) NH3, Ammonia - Weak base
(h) NaCl, Sodium chloride - Soluble ionic compound
(i) Fe2O3, Iron(III) oxide - Insoluble ionic compound
(j) NaHCO3, Sodium bicarbonate - Soluble ionic compound (Weak base)
.
8- How will doubling the concentration of H20 in the following reactio.docx
8. How will doubling the concentration of H20 in the following reaction impact the rate? CI +H20 A. Double the rate B. Halve the rate C. Quadruple the rate D. No change to the rate
Solution
H2O Concentration will not impact the rate because this reaction occurs in two step . First step is broken of Cl bond and second step is attack of H2O molecule.Firs t step is rate determining step. So concentration of H2O will not impact. First step is slow step.
option D is correct
If satisfied please rate it. Thanks
Any query please comment.
.
73- On January 1- 2010- Lynn Company borrows $2-000-000 from National.docx
73. On January 1, 2010, Lynn Company borrows $2,000,000 from National Bank at 11% annual interest. In addition, Lynn is required to keep a compensatory balance of $200,000 on deposit at National Bank which will earn interest at 5%. The effective interest that Lynn pays on its $2,000,000 loan is
a.  10.0%.
b.  11.0%.
c.  11.5%.
d.  11.6%.
Solution
Interest paid on $1.8 million = $198,000
Interest paid on $200,000 savings = $12,000 [$200,000×(11%-5%)]
Total interest paid = $210,000
Net funds received for utilisation = $1.8 million
Effective interest rate = 11.6% [$210,000÷$1,800,000]
Correct option is (d)
.
6- Because most reps access the TAL Distributors database from their m.docx
6. Because most reps access the TAL Distributors database from their mobile devices, such as smart phones and tablets, the DBA is considering the potential use of cloud computing. Use books, articles, and/or the Internet to research cloud computing, then write a report that describes the advantages and disadvantages of making data available in the cloud.
Solution
Cloud computing refers to the computer hardware and software which resides on a remote machine and the services are delivered to the end user through the means of internet over the network.
Advantages:
Disadvantages:
These are the advantages and disadvantages of cloud storage.
.
Recommended
7- (6) Describe the interference pattern produced by light going throu.docx
7. (6) Describe the interference pattern produced by light going through two slits one photon at a time as it might be recorded by photographic film. Discuss how this helps interpret the dual nature of light and how it relates to the wave function of the photon.
Solution
Interference is phenomenon where the rearrangement of light has been done or in other words the
combination of different wave to produce resultant wave. If both the wave are in phase then it will add up and
produce the bright fringe or if they are in different phase then they will cancel each other and lead to prroduce dark fringe.
Initially in ray optics we have considered the light has nature of ray that means light move in straight direction
but when we have seen the phenomenon of interference we come to know that light has small particle known as photon which travels in the form of wave.
That means light has wave nature whcih is othe nature of light.
.
6-14-2018 1159 PM 60-2-100 Gradeboo -Print Calculator Periodic Table Q.docx
6/14/2018 1159 PM 60.2/100 Gradeboo -Print Calculator Periodic Table Question 45 of 55 Sapling Learning Map At 25 ?, how many dissociated OH ions are there in 1 267 mL of an aqueous solution whose pH is 2.08? Number ions O Previous Give Up & View Solution Check Answer Next x to search ?
Solution
use:
pH = -log [H+]
2.08 = -log [H+]
[H+] = 8.318*10^-3 M
use:
[OH-] = Kw/[H+]
Kw is dissociation constant of water whose value is 1.0*10^-14 at 25 oC
[OH-] = (1.0*10^-14)/[H+]
[OH-] = (1.0*10^-14)/(8.318*10^-3)
[OH-] = 1.202*10^-12 M
number of mol of OH- = [OH-] * volume in L
= 1.202*10^-12 M * 1.267 L
= 1.523*10^-12 mol
number of OH- = number of mol * Avogadro’s number
= 1.523*10^-12 mol * 6.022*10^23 ions/mol
= 9.17*10^11 ions
Answer: 9.17*10^11 ions
.
802-11 networks are identified by which of the following- A- Security.docx
802.11 networks are identified by which of the following?
A. Security identifier (SID)
B. Broadcast name
C. Kismet
D. Service set identifier (SSID)
Solution
Answer: D. Service set identifier (SSID)
SSID is nothing but a network name that identifies the wireless networks.
It is a case sensitive and it should be a 32 alphanumeric characters unique number that can be used to pass the header of the packets that are sent over the wireless networks.
Multiple SSID can also be existed. By using Multiple SSID we can connect different networks thorugh a single access point. The network manager will take care of managing different SSIDs over the multiple wireless networks.
.
8- Multiprocessing with a single core processor is ________________- 9.docx
8. Multiprocessing with a single core processor is ________________.
9. The log file records every transaction that requires a ______ access to the file system?
Solution
8.
Multiprocessing with a single core processor is Multitasking .
in single core processor when more then one processes are running together then it is called multitasking and this is accomplished by the use of cpu scheduling techniques like (first come first serve)fcfs,(shortest job first)sjf,(shortest remaining time first)srtf.
9.
The log file records every transaction that requires a direct access to the file system.
log file is the file used to store the log or information about each transaction which can be later used fo file system crashes or reboot or system restore etc
.
8- Identily cach of the following as a strong acid- a weak acid- a bas.docx
8. Identily cach of the following as a strong acid, a weak acid, a basc, a soluble ionic compound, or an insoluble ionic compound in water (a) HNO (c) CH COOH (e) ZnS (f) Fe(NO-):6H O (g) NHs (h)NaCI GNaHCO
Solution
(a) HNO3, Nitric acid - Strong acid
(b) LiOH, Lithium hydroxide - Strong base
(c) CH3COOH, Acetic acid - Weak acid
(d) H2SO4, Sulphuric acid - Strong acid
(e) ZnS, Zinc sulphide - Insoluble ionic compound
(f) Fe(NO3)2.6H2O, Iron(II) nitrate hexahydrate - Soluble ionic compound
(g) NH3, Ammonia - Weak base
(h) NaCl, Sodium chloride - Soluble ionic compound
(i) Fe2O3, Iron(III) oxide - Insoluble ionic compound
(j) NaHCO3, Sodium bicarbonate - Soluble ionic compound (Weak base)
.
8- How will doubling the concentration of H20 in the following reactio.docx
8. How will doubling the concentration of H20 in the following reaction impact the rate? CI +H20 A. Double the rate B. Halve the rate C. Quadruple the rate D. No change to the rate
Solution
H2O Concentration will not impact the rate because this reaction occurs in two step . First step is broken of Cl bond and second step is attack of H2O molecule.Firs t step is rate determining step. So concentration of H2O will not impact. First step is slow step.
option D is correct
If satisfied please rate it. Thanks
Any query please comment.
.
73- On January 1- 2010- Lynn Company borrows $2-000-000 from National.docx
73. On January 1, 2010, Lynn Company borrows $2,000,000 from National Bank at 11% annual interest. In addition, Lynn is required to keep a compensatory balance of $200,000 on deposit at National Bank which will earn interest at 5%. The effective interest that Lynn pays on its $2,000,000 loan is
a.  10.0%.
b.  11.0%.
c.  11.5%.
d.  11.6%.
Solution
Interest paid on $1.8 million = $198,000
Interest paid on $200,000 savings = $12,000 [$200,000×(11%-5%)]
Total interest paid = $210,000
Net funds received for utilisation = $1.8 million
Effective interest rate = 11.6% [$210,000÷$1,800,000]
Correct option is (d)
.
6- Because most reps access the TAL Distributors database from their m.docx
6. Because most reps access the TAL Distributors database from their mobile devices, such as smart phones and tablets, the DBA is considering the potential use of cloud computing. Use books, articles, and/or the Internet to research cloud computing, then write a report that describes the advantages and disadvantages of making data available in the cloud.
Solution
Cloud computing refers to the computer hardware and software which resides on a remote machine and the services are delivered to the end user through the means of internet over the network.
Advantages:
Disadvantages:
These are the advantages and disadvantages of cloud storage.
.
6- An airplane flies 450 km from Raleigh to Washington DC at 500 km-hr.docx
6. An airplane flies 450 km from Raleigh to Washington DC at 500 km/hr. It stops for a while in Washington DC and then flies 370 km to New York at 500 km/hr. If the average speed for the entire trip from Raleigh to New York is 125 km/hr how long did the plane stop in Washington DC? A 6.56 hours B 4.92 hours C 1.64 hours D 1.46 hours E 2.62 hours
Solution
Time required to travel From Raleigh to New York,
t1 = (450 / 500) + (370 / 500)
t1 = 1.64 hr
When average speed is 125 km/hr,
t2 = (450 + 370) / 125
t2 = 6.56 hr
Let, plane stops in washington DC for time t.
t = t2 - t1
t = 6.56 - 1.64
t = 4.92 hours (option B)
.
6- A 25-kg ball with a radius of 10 cm is submerged held halfway down.docx
6. A 25-kg ball with a radius of 10 cm is submerged held halfway down a 1-m tall tank of water. Once released, will it float to the top or sink to the bottom? How long will it take to reach the surface/bottom?
Solution
volume of the sphere ,
V =4pi/3 * r^3
V = 4pi/3 * 0.10^3
V = 4.19 *10^-3 m^3
bouyant force , Fs = density of water * V * g
Fs = 4.19 *10^-3 *1000 * 9.8
Fs = 41 N
weight of the ball = 25 * 9.8 = 245 N
as the weight is larger than the buyoant force
the ball will sink to the bottom
for the acceleration of the ball
25 * a = 245 - 41
a = 8.16 m/s^2
let the time taken is t
1/2 = 0.50 * 8.16 * t^2
t = 0.35 s
the time taken to reach bottom is 0.35 s
.
7- Write a mass action expression for the reaction between marble (CaC.docx
7. Write a mass action expression for the reaction between marble (CaCO2) and hydrochloric acid.
Solution
CaCO3(s) + 2HCl(aq) ------------> CaCl2(aq) + H2O(l)
Rate of forward reaction = Kf[HCl]^2
Rate of reverse reaction = Kb[CaCl2]
At equilibrium rate of forward reaction = rate of reverse reaction
Kf[HCl]^2 = Kb[CaCl2]
Kf/Kb = [CaCl2]/[HCl]^2
Kc = [CaCl2]/[HCl]^2 >>>answer
.
7- Flow and stock variables Identify whether each of the following is (1).docx
7. Flow and stock variables Identify whether each of the following is a flow variable or a stock variable: Flow Stock The value of a Picasso painting The federal government budget deficit The number of Canadian immigrants living in the United States The number of Canadians who emigrate to the United States each year The amount by which a Picasso painting increases in value each year The federal government debt
Solution
Hi,
Please find the answer as follows:
1) Stock Variable
---
2) Flow Variable
---
3) Stock Variable
---
4) Flow Variable
---
5) Flow Variable
---
6) Stock Variable
Thanks.
.
7- Heat is (a) a fluid called caloric- (b) a measure of the average ki.docx
7. Heat is (a) a fluid called caloric. (b) a measure of the average kinetic energy of atoms. (c) the amount of energy transferred between objects as a result of a difference in temperature. (d) an invisible, odorless, weightless substance. (e) the total kinetic energy of an ideal gas.
Solution
When two materials are at different temperatures (that is, they have different average kinetic energies per molecule), energy can transfer from the hot object to the cold object. This transfer of energy is called heat.Heat is not a propety of material neither its a matter. Heat is
(c) the amount of energy transierred between objects as a
result of a difference in temperature .
.
7- Flow and stock variables Identify whether each of the following is.docx
7. Flow and stock variables Identify whether each of the following is a flow variable or a stock variable: Flow Stock The value of a Picasso painting The federal government budget deficit The number of Canadian immigrants living in the United States The number of Canadians who emigrate to the United States each year The amount by which a Picasso painting increases in value each year The federal government debt
Solution
Hi,
Please find the answer as follows:
1) Stock Variable
---
2) Flow Variable
---
3) Stock Variable
---
4) Flow Variable
---
5) Flow Variable
---
6) Stock Variable
Thanks.
.
1)- The total number of ions present in iron (II) carbonate is -- 2)-.docx
1). The total number of ions present in iron (II) carbonate is ??
2). Which compound’s name ends in -ite ?
HClO
MgSO3
H2SO3
1). The total number of ions present in iron (II) carbonate is ??
2). Which compound’s name ends in -ite ?
HClO
MgSO3
H2SO3
2). Which compound’s name ends in -ite ?
HClO
MgSO3
H2SO3
Solution
1.FeCO3 ( Iron 2 carbonate) has total two ions , one Fe^+ ion and one CO3^2- ion .
2 . HClO = Hypochlorous acid
MgSO3 = Magnesium sulfite .
H2SO3 = Sulfurous acid .
So MgSO3 ends in -ite .
.
1) Which of the following can behave as Bronsted-Lowry bases in aqueou.docx
1)
Which of the following can behave as Bronsted-Lowry bases in aqueous solution?
H 2 S
I -
Na +
HNO 2
None of the Above
2)
Which of the following can behave as Bronsted-Lowry bases in aqueous solution?
NH 3
HClO 4
Br -
HSO 3 -
None of the Above
Solution
Ans 1 : I -
According to the Bronsted lowry concept , the species that give off their protons are called as acids , and the ones that can accept it are called as bases.
Since here iodide ion has -1 charge on it , it has the tendency to accept one hydrogen ions (proton) and become HI , so it behaves as bronsted lowry base.
.
1) The rodent population in a city is currently estimated at 30-000- I.docx
1) The rodent population in a city is currently estimated at 30,000. If it is expected to double every 5 years, when will the population reach 1 million?
2) How many ways can 4 men abd 4 women stand in line if all women are first.
Solution
1. 5*log (1000000/30000) (base2) =5* 5.0587494123=25.29 yrs
2. 4!. 4! = 576
.
1) How is the current ratio calculated- 2) How does a classified balan.docx
1) How is the current ratio calculated?
2) How does a classified balance sheet help this calculation?
3) How is it used to evaluate a company?
4) Give an example of a good current ratio and a bad current ratio.
Solution
1. Current ratio = Current assets ÷ Current liabilities
2. A classified balance sheet will have 4 sections, current assets, noncurrent assets, current liabilities and noncurrent liabilities. It is easier to obtain the values of current assets and current liabilities from this balance sheet.
3. It is used to evaluate the liquidity of the company and represents company’s ability to pay current liabilities.
4. If the current ratio is more than 1, company has enough liquidity and vice-versa.
Current assets = 15 million and current liabilities = 10 million
Good current ratio = 1.5
Current assets = 15 million and current liabilities = 30 million
Bad current ratio = 0.5
.
1) describe the conditions neccesary for a lunar eclipse to occur- and.docx
1) describe the conditions neccesary for a lunar eclipse to occur, and 2) diifferentiate between the umbra and penumbra and how it influences a lunar eclipse.
Solution
Lunar eclipse occurs when moon comes in between sun and earth. If moon covers sun fully total lunar eclipse happen and if it covers sun partially .. partial lunar eclipse occurs .
And if size of moon is smaller than sun then a bright ring will appear and annular solar eclipse will happen .
2.Now umbra and penumbra occurs when total solar eclipse happens . The darkest ring during total solar eclipse is know as umbra . And this part is the shadow of moon on earth.
Now lighter part of the shadow outside of umbra is called penumbra . Both occurs at same time when total solar eclipse occurs
.
1) compare and contrast the properties of the terrestrial planets and.docx
1) compare and contrast the properties of the terrestrial planets and the Jovian planets
2) categorize the Pluto as either a Jovian planet, terrestrial planet, or other celestial object based upon its characteristics
3) identify the least dense and most dense planets and provide an explanation as to why they are the least and most dense.
4) explain why Pluto has been re-categorized as a dwarf planet.
Solution
1) differences between terrestrial and jovian planets
a) terrestrial planets are made of solid surface while jovian planets are made of gaseous surface
b) jovian planets are much larger than terrestrial planets
c) jovian planets are far away from the su
d) the number of moons are higher in jovian planets
e) terrestrial planets spin less and hence are flatter at the poles
.
1- Lithium vapor is produced by heating lithium to its boiling point o.docx
1. Lithium vapor is produced by heating lithium to its boiling point of 1340 °C. The result is Li 2 molecules which have a molecular mass of 14 u. How does their rms speed compare to that of nitrogen gas (N 2 ) molecules (molecular mass of 28 g) at the same temperature?
A. of Li 2 of N 2 B. of Li 2 of N 2
C. of Li 2 of N 2 D. of Li 2 of N 2
E. of Li 2 of N 2 F. something else
Solution
R = 8.314 J/mol K
T = 1340 C = 1613.15 K
M Li = 14 g/mole
MN2 = 28 g/mole
from the relation
v rms = sqrt(3RT/M)
vN2/vLi = sqrt(14/28) = 0.704
v rms of N2 is = 0.71 *v rms of Li2
.
1- On November 28- 2013- Elliott Company purchased 10-000 shares of Fe.docx
1. On November 28, 2013, Elliott Company purchased 10,000 shares of Ferno Corporation stock for $360,000. Elliott
Solution
1. Elliot Co .
2. Myers Co.
.
1) Bit-level transmission (or reception) is at the __- 2) Buffering at.docx
1) Bit-level transmission (or reception) is at the __?
2) Buffering at the router is needed when ___?
3) How many interfaces can a host have ____?
4) How many interfaces can a router have ____?
5) In IP addressing, the subnet part is __?
6) In IP addressing, the host part is ___?
7) Devices in a subnet can physically reach each other without intervening __?
Solution
1 , Physical Layer
2. Uncontrollable Trafic like vedio streaming
3. One.
4. Multiple.
5. In IP addressing, the network part is high order bits.
6. In IP addressing, the host partt is low order bits.
Devices in a subnet can physically reach each other without intervening router.
.
1- If S is a finite set and f is a 1-1 mapping of S into itself- show.docx
1. If S is a finite set and f is a 1-1 mapping of S into itself, show that f must be surjective. 2.Let f:S -> S, where S is the set of all integers, be defined by f(s) =as + b, where a, b are integers. Find the necessary and sufficient conditions on a, b in order that f%u3002f = is. PLEASE SHOW STEPS!!THANKS!!
Solution
Since S is a finite set and also it is an one to one mapping implies that only one element from domain \"S\" can be linked to the range \"S\" which implies that every element is linked to every other element such that the range and codomain are same i.e both onto and also into which implies that S is surjection.
The second question is not clear pls comment bellow
Hope it Helps ..Thank you :D
.
1- how did the paleolithic and neolithic ages differ and how did the n.docx
1. how did the paleolithic and neolithic ages differ and how did the neolithic revolution affect the lives of men and women
2. what are the characteristics of civilization and what are some explanations for why early civilization emerged
Solution
1 )
paleolthic ages are related to the ancient people,
so these people are gains the food by using hunting the animals and having the fruits from the forest.
now coming into neolithic ages are related to the exact near to the society which we are living.
that the food can be gain by using forming.
so in neolithic revolution the effect of the lives of men and women is completely based on the living habits like
attairs etc....
2 )
it is saya that in simple manner that early civilization is gone on the basis of gathering food with the help of labour..
modern civilization is based on the inventions in the food gathering , forming techniques.
.
1- How can you assess if you are engaging in active listening- (Be spe.docx
1. How can you assess if you are engaging in active listening? (Be specific and give an example)
2.How does it feel when someone does not seem to be listening to you?
3.Some companies have MySpace pages where employees can mingle and share ideas and information. Do you think this practice is a good idea? Why or why not?
4.What advice would you give to someone who is going to become a first time manager in terms of communication
Solution
1) Engaging Others is the second milestone on the way to becoming an effective leader. Armed with a deeper understanding of yourself, your motivations your talents and areas of
.
1- How can you assess if you are engaging in active listening- (Be spe (1).docx
1. How can you assess if you are engaging in active listening? (Be specific and give an example)
2.How does it feel when someone does not seem to be listening to you?
3.Some companies have MySpace pages where employees can mingle and share ideas and information. Do you think this practice is a good idea? Why or why not?
4.What advice would you give to someone who is going to become a first time manager in terms of communication
Solution
1) Engaging Others is the second milestone on the way to becoming an effective leader. Armed with a deeper understanding of yourself, your motivations your talents and areas of
.
1)Describe the structural differences that make the chemical propertie.docx
1)Describe the structural differences that make the chemical properties of phenols somewhat different from the chemical properties of alcohols.
2) What is the main structural difference between an alcohol or phenol and an ether? How doe this affect the reactivity of an ether?
Solution
1) Phenol is OH group attached to benzene ring , alcohols are OH group attached to carbon chain. Phenols are more acidic than alcohols since benzene ring creates acidic nature of OH group . Phenols have higher boiling points compared to alcohols.
2) ether has C-O-C linkage while alcohols ( or phenols) have C-OH . ethers are non polar ( slightly polar) while alcohols have polar OH groups. This makes alcohols more reactive and alcohols have higher boiling points compared to ethers.
.
South African Journal of Science: Writing with integrity workshop (2024)
South African Journal of Science: Writing with integrity workshop (2024)Academy of Science of South Africa
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.More Related Content
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6- An airplane flies 450 km from Raleigh to Washington DC at 500 km-hr.docx
6. An airplane flies 450 km from Raleigh to Washington DC at 500 km/hr. It stops for a while in Washington DC and then flies 370 km to New York at 500 km/hr. If the average speed for the entire trip from Raleigh to New York is 125 km/hr how long did the plane stop in Washington DC? A 6.56 hours B 4.92 hours C 1.64 hours D 1.46 hours E 2.62 hours
Solution
Time required to travel From Raleigh to New York,
t1 = (450 / 500) + (370 / 500)
t1 = 1.64 hr
When average speed is 125 km/hr,
t2 = (450 + 370) / 125
t2 = 6.56 hr
Let, plane stops in washington DC for time t.
t = t2 - t1
t = 6.56 - 1.64
t = 4.92 hours (option B)
.
6- A 25-kg ball with a radius of 10 cm is submerged held halfway down.docx
6. A 25-kg ball with a radius of 10 cm is submerged held halfway down a 1-m tall tank of water. Once released, will it float to the top or sink to the bottom? How long will it take to reach the surface/bottom?
Solution
volume of the sphere ,
V =4pi/3 * r^3
V = 4pi/3 * 0.10^3
V = 4.19 *10^-3 m^3
bouyant force , Fs = density of water * V * g
Fs = 4.19 *10^-3 *1000 * 9.8
Fs = 41 N
weight of the ball = 25 * 9.8 = 245 N
as the weight is larger than the buyoant force
the ball will sink to the bottom
for the acceleration of the ball
25 * a = 245 - 41
a = 8.16 m/s^2
let the time taken is t
1/2 = 0.50 * 8.16 * t^2
t = 0.35 s
the time taken to reach bottom is 0.35 s
.
7- Write a mass action expression for the reaction between marble (CaC.docx
7. Write a mass action expression for the reaction between marble (CaCO2) and hydrochloric acid.
Solution
CaCO3(s) + 2HCl(aq) ------------> CaCl2(aq) + H2O(l)
Rate of forward reaction = Kf[HCl]^2
Rate of reverse reaction = Kb[CaCl2]
At equilibrium rate of forward reaction = rate of reverse reaction
Kf[HCl]^2 = Kb[CaCl2]
Kf/Kb = [CaCl2]/[HCl]^2
Kc = [CaCl2]/[HCl]^2 >>>answer
.
7- Flow and stock variables Identify whether each of the following is (1).docx
7. Flow and stock variables Identify whether each of the following is a flow variable or a stock variable: Flow Stock The value of a Picasso painting The federal government budget deficit The number of Canadian immigrants living in the United States The number of Canadians who emigrate to the United States each year The amount by which a Picasso painting increases in value each year The federal government debt
Solution
Hi,
Please find the answer as follows:
1) Stock Variable
---
2) Flow Variable
---
3) Stock Variable
---
4) Flow Variable
---
5) Flow Variable
---
6) Stock Variable
Thanks.
.
7- Heat is (a) a fluid called caloric- (b) a measure of the average ki.docx
7. Heat is (a) a fluid called caloric. (b) a measure of the average kinetic energy of atoms. (c) the amount of energy transferred between objects as a result of a difference in temperature. (d) an invisible, odorless, weightless substance. (e) the total kinetic energy of an ideal gas.
Solution
When two materials are at different temperatures (that is, they have different average kinetic energies per molecule), energy can transfer from the hot object to the cold object. This transfer of energy is called heat.Heat is not a propety of material neither its a matter. Heat is
(c) the amount of energy transierred between objects as a
result of a difference in temperature .
.
7- Flow and stock variables Identify whether each of the following is.docx
7. Flow and stock variables Identify whether each of the following is a flow variable or a stock variable: Flow Stock The value of a Picasso painting The federal government budget deficit The number of Canadian immigrants living in the United States The number of Canadians who emigrate to the United States each year The amount by which a Picasso painting increases in value each year The federal government debt
Solution
Hi,
Please find the answer as follows:
1) Stock Variable
---
2) Flow Variable
---
3) Stock Variable
---
4) Flow Variable
---
5) Flow Variable
---
6) Stock Variable
Thanks.
.
1)- The total number of ions present in iron (II) carbonate is -- 2)-.docx
1). The total number of ions present in iron (II) carbonate is ??
2). Which compound’s name ends in -ite ?
HClO
MgSO3
H2SO3
1). The total number of ions present in iron (II) carbonate is ??
2). Which compound’s name ends in -ite ?
HClO
MgSO3
H2SO3
2). Which compound’s name ends in -ite ?
HClO
MgSO3
H2SO3
Solution
1.FeCO3 ( Iron 2 carbonate) has total two ions , one Fe^+ ion and one CO3^2- ion .
2 . HClO = Hypochlorous acid
MgSO3 = Magnesium sulfite .
H2SO3 = Sulfurous acid .
So MgSO3 ends in -ite .
.
1) Which of the following can behave as Bronsted-Lowry bases in aqueou.docx
1)
Which of the following can behave as Bronsted-Lowry bases in aqueous solution?
H 2 S
I -
Na +
HNO 2
None of the Above
2)
Which of the following can behave as Bronsted-Lowry bases in aqueous solution?
NH 3
HClO 4
Br -
HSO 3 -
None of the Above
Solution
Ans 1 : I -
According to the Bronsted lowry concept , the species that give off their protons are called as acids , and the ones that can accept it are called as bases.
Since here iodide ion has -1 charge on it , it has the tendency to accept one hydrogen ions (proton) and become HI , so it behaves as bronsted lowry base.
.
1) The rodent population in a city is currently estimated at 30-000- I.docx
1) The rodent population in a city is currently estimated at 30,000. If it is expected to double every 5 years, when will the population reach 1 million?
2) How many ways can 4 men abd 4 women stand in line if all women are first.
Solution
1. 5*log (1000000/30000) (base2) =5* 5.0587494123=25.29 yrs
2. 4!. 4! = 576
.
1) How is the current ratio calculated- 2) How does a classified balan.docx
1) How is the current ratio calculated?
2) How does a classified balance sheet help this calculation?
3) How is it used to evaluate a company?
4) Give an example of a good current ratio and a bad current ratio.
Solution
1. Current ratio = Current assets ÷ Current liabilities
2. A classified balance sheet will have 4 sections, current assets, noncurrent assets, current liabilities and noncurrent liabilities. It is easier to obtain the values of current assets and current liabilities from this balance sheet.
3. It is used to evaluate the liquidity of the company and represents company’s ability to pay current liabilities.
4. If the current ratio is more than 1, company has enough liquidity and vice-versa.
Current assets = 15 million and current liabilities = 10 million
Good current ratio = 1.5
Current assets = 15 million and current liabilities = 30 million
Bad current ratio = 0.5
.
1) describe the conditions neccesary for a lunar eclipse to occur- and.docx
1) describe the conditions neccesary for a lunar eclipse to occur, and 2) diifferentiate between the umbra and penumbra and how it influences a lunar eclipse.
Solution
Lunar eclipse occurs when moon comes in between sun and earth. If moon covers sun fully total lunar eclipse happen and if it covers sun partially .. partial lunar eclipse occurs .
And if size of moon is smaller than sun then a bright ring will appear and annular solar eclipse will happen .
2.Now umbra and penumbra occurs when total solar eclipse happens . The darkest ring during total solar eclipse is know as umbra . And this part is the shadow of moon on earth.
Now lighter part of the shadow outside of umbra is called penumbra . Both occurs at same time when total solar eclipse occurs
.
1) compare and contrast the properties of the terrestrial planets and.docx
1) compare and contrast the properties of the terrestrial planets and the Jovian planets
2) categorize the Pluto as either a Jovian planet, terrestrial planet, or other celestial object based upon its characteristics
3) identify the least dense and most dense planets and provide an explanation as to why they are the least and most dense.
4) explain why Pluto has been re-categorized as a dwarf planet.
Solution
1) differences between terrestrial and jovian planets
a) terrestrial planets are made of solid surface while jovian planets are made of gaseous surface
b) jovian planets are much larger than terrestrial planets
c) jovian planets are far away from the su
d) the number of moons are higher in jovian planets
e) terrestrial planets spin less and hence are flatter at the poles
.
1- Lithium vapor is produced by heating lithium to its boiling point o.docx
1. Lithium vapor is produced by heating lithium to its boiling point of 1340 °C. The result is Li 2 molecules which have a molecular mass of 14 u. How does their rms speed compare to that of nitrogen gas (N 2 ) molecules (molecular mass of 28 g) at the same temperature?
A. of Li 2 of N 2 B. of Li 2 of N 2
C. of Li 2 of N 2 D. of Li 2 of N 2
E. of Li 2 of N 2 F. something else
Solution
R = 8.314 J/mol K
T = 1340 C = 1613.15 K
M Li = 14 g/mole
MN2 = 28 g/mole
from the relation
v rms = sqrt(3RT/M)
vN2/vLi = sqrt(14/28) = 0.704
v rms of N2 is = 0.71 *v rms of Li2
.
1- On November 28- 2013- Elliott Company purchased 10-000 shares of Fe.docx
1. On November 28, 2013, Elliott Company purchased 10,000 shares of Ferno Corporation stock for $360,000. Elliott
Solution
1. Elliot Co .
2. Myers Co.
.
1) Bit-level transmission (or reception) is at the __- 2) Buffering at.docx
1) Bit-level transmission (or reception) is at the __?
2) Buffering at the router is needed when ___?
3) How many interfaces can a host have ____?
4) How many interfaces can a router have ____?
5) In IP addressing, the subnet part is __?
6) In IP addressing, the host part is ___?
7) Devices in a subnet can physically reach each other without intervening __?
Solution
1 , Physical Layer
2. Uncontrollable Trafic like vedio streaming
3. One.
4. Multiple.
5. In IP addressing, the network part is high order bits.
6. In IP addressing, the host partt is low order bits.
Devices in a subnet can physically reach each other without intervening router.
.
1- If S is a finite set and f is a 1-1 mapping of S into itself- show.docx
1. If S is a finite set and f is a 1-1 mapping of S into itself, show that f must be surjective. 2.Let f:S -> S, where S is the set of all integers, be defined by f(s) =as + b, where a, b are integers. Find the necessary and sufficient conditions on a, b in order that f%u3002f = is. PLEASE SHOW STEPS!!THANKS!!
Solution
Since S is a finite set and also it is an one to one mapping implies that only one element from domain \"S\" can be linked to the range \"S\" which implies that every element is linked to every other element such that the range and codomain are same i.e both onto and also into which implies that S is surjection.
The second question is not clear pls comment bellow
Hope it Helps ..Thank you :D
.
1- how did the paleolithic and neolithic ages differ and how did the n.docx
1. how did the paleolithic and neolithic ages differ and how did the neolithic revolution affect the lives of men and women
2. what are the characteristics of civilization and what are some explanations for why early civilization emerged
Solution
1 )
paleolthic ages are related to the ancient people,
so these people are gains the food by using hunting the animals and having the fruits from the forest.
now coming into neolithic ages are related to the exact near to the society which we are living.
that the food can be gain by using forming.
so in neolithic revolution the effect of the lives of men and women is completely based on the living habits like
attairs etc....
2 )
it is saya that in simple manner that early civilization is gone on the basis of gathering food with the help of labour..
modern civilization is based on the inventions in the food gathering , forming techniques.
.
1- How can you assess if you are engaging in active listening- (Be spe.docx
1. How can you assess if you are engaging in active listening? (Be specific and give an example)
2.How does it feel when someone does not seem to be listening to you?
3.Some companies have MySpace pages where employees can mingle and share ideas and information. Do you think this practice is a good idea? Why or why not?
4.What advice would you give to someone who is going to become a first time manager in terms of communication
Solution
1) Engaging Others is the second milestone on the way to becoming an effective leader. Armed with a deeper understanding of yourself, your motivations your talents and areas of
.
1- How can you assess if you are engaging in active listening- (Be spe (1).docx
1. How can you assess if you are engaging in active listening? (Be specific and give an example)
2.How does it feel when someone does not seem to be listening to you?
3.Some companies have MySpace pages where employees can mingle and share ideas and information. Do you think this practice is a good idea? Why or why not?
4.What advice would you give to someone who is going to become a first time manager in terms of communication
Solution
1) Engaging Others is the second milestone on the way to becoming an effective leader. Armed with a deeper understanding of yourself, your motivations your talents and areas of
.
1)Describe the structural differences that make the chemical propertie.docx
1)Describe the structural differences that make the chemical properties of phenols somewhat different from the chemical properties of alcohols.
2) What is the main structural difference between an alcohol or phenol and an ether? How doe this affect the reactivity of an ether?
Solution
1) Phenol is OH group attached to benzene ring , alcohols are OH group attached to carbon chain. Phenols are more acidic than alcohols since benzene ring creates acidic nature of OH group . Phenols have higher boiling points compared to alcohols.
2) ether has C-O-C linkage while alcohols ( or phenols) have C-OH . ethers are non polar ( slightly polar) while alcohols have polar OH groups. This makes alcohols more reactive and alcohols have higher boiling points compared to ethers.
.
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