7- Consider a beaker of pure water and a swimming pool of pure water-.docx

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7. Consider a beaker of pure water and a swimming pool of pure water. Which of the following statements are true about the water in each case and WHY? I. They have the same heat capacity. II. They have the same molar heat capacity. III. They have the same specific heat capacity. Solution Molar heat capacity is heat capacity for 1 mol So, this doesnâ€™t depend on quantity of water present So, Molar heat capacity will be same in both cases specific heat capacity is heat capacity for 1 g So, this doesnâ€™t depend on quantity of water present So, Molar heat capacity will be same in both cases Heat capacity depends on the quantity of water heat capacity = mass * specific heat capacity So, the one with greater mass will have greater heat capacity Answer: II and III are true .

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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- Because most reps access the TAL Distributors database from their m.docx

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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) .

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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 .

6- A 25-kg ball with a radius of 10 cm is submerged held halfway down.docx

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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 .

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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. .

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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 . .

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7- Flow and stock variables Identify whether each of the following is.docx

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1). The total number of ions present in iron (II) carbonate is ?? 2). Which compoundâ€™s name ends in -ite ? HClO MgSO3 H2SO3 1). The total number of ions present in iron (II) carbonate is ?? 2). Which compoundâ€™s name ends in -ite ? HClO MgSO3 H2SO3 2). Which compoundâ€™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 . .

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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. .

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1) The rodent population in a city is currently estimated at 30-000- I.docx

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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 Ã· 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 companyâ€™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 .

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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 .

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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 .

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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 .

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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 .

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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. .

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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 .

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