Use an identity to find the exact value of cos pi12. -Please state .pdf

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Use an identity to find the exact value of cos pi/12. -Please state the identity used, thanks in advance. Solution cos(pi/12) = cos(pi/3 -pi/4) Now use identity: cos(A-B) = cosAcosB +sinAsinB cos(pi/12) = cos(pi/3 -pi/4) = cospi/3*cospi/4 +sinpi/3sinpi/4 = (1/2)(1/sqrt2) +( sqrt3/2)(1/sqrt2) = ( 1+sqrt3)/2sqrt2.

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Evidence indicates that the evolution of vascular tissue coincided with a five fold drop in atmospheric CO¬2 levels during the Carboniferous period, causing global cooling that resulted in widespread glacier formation. What is a possible explanation for this? Solution Ans. CO2 is the most important greenhouse gas responsible for absorbing a fraction of solar radiation and converting it into heat. Thus, the gas keeps Earth’s atmosphere warm. Increase in atmospheric CO2 is evidently responsible for global warming. Carboniferous plants (bear vascular tissues) covered a large fraction of Earth surface during the geological time. Due to efficient photosynthesis, the converted more and more atmospheric CO2 into carbohydrates (wood) as evident by the coal deposits of theta geological period. As a result, the atmospheric CO2 concentration dropped a lot. A drop in atmospheric CO2 led to lesser greenhouse effect, that further led to global cooling..

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Describe the difference bettween a kinase and a phosphatase. Solution Kinase Phosphatase catalyze the phosphorylation reactions by the addition of phosphate groups from ATP to protein molecules. catalyze the dephosphorylation reactions by removing of phosphate groups from substrates. The phosphorylation reaction is unidirectional The dephosphorylation reaction is bidirectional Kinase uses ATP to obtain phosphate groups Phosphatase use water molecules to remove phosphate groups Proteins that are activated by a kinase Proteins deactivated by a phosphatase. Kinase Phosphatase catalyze the phosphorylation reactions by the addition of phosphate groups from ATP to protein molecules. catalyze the dephosphorylation reactions by removing of phosphate groups from substrates. The phosphorylation reaction is unidirectional The dephosphorylation reaction is bidirectional Kinase uses ATP to obtain phosphate groups Phosphatase use water molecules to remove phosphate groups Proteins that are activated by a kinase Proteins deactivated by a phosphatase..

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Consider the above diagram. FIGURE, of the car park The object of this assignment is to write a program to operate the barriers to allow the cars in and out. As you can see there is a box in which there are two condition lights for when the car park is Full, and when there are Spaces. The entrance to the car park is on the left hand side. When a car drives into the car park there is a sensor that detects the car and this should cause the barrier to be opened to allow the car in. On the right hand side is the exit. When a car leaves the car park it will activate a sensor inside the park to open the exit barrier. Both the entry and exit barriers will need to be in the Up position long enough to allow the cars to enter or leave the car park. The inputs and outputs are listed as follows: IP0 = Entry Sensor OP0 = Entry Barrier IP1 = Exit Sensor OP1 = Exit Barrier OP2 = Full Light OP3 = Spaces Light When writing the program it is necessary to observe the following conditions. When the car park is not full the Spaces light should be \'ON\'. When the car park is full the Full light should be \'ON\'. As a car enters or leaves the car park the entry and exit barriers have to be held in the Up position long enough to allow the cars to pass under the barriers. When the program is complete and the car park graphic is displayed in Simulation mode the program is operated by pointing at the car and clicking the mouse button. You will see directional pointers left and right so point at and click the direction you wish the car to travel. When you wish a car to leave the car park point at the one you wish to leave the park and click. You should explain the operation of the program, using the documentation facility. Solution International Journal of Scientific and Research Publications, Volume 2, Issue 10, October 2012 1 ISSN 2250-3153 ITS IMPLEMENTED IN THIS PAPER ,PLEASE GO THROUGH IT. Abstract- Recently, with the rapid development of micro electronics technology, wireless communication technology and embedded system, the technology of wireless sensor network (WSN) has been advanced a lot. At the meanwhile, more and more producers and international organizers want to make the mote more intelligent and standard. Sensor Networks being considered as an emerging area of research in recent years has evolved in itself a large potential to counteract the ongoing system. By networking large numbers of tiny sensor motes, it is possible to obtain data about physical phenomena that was difficult or even sometimes impossible to obtain in conventional ways. Automatic multi-stored car parking system is very good substitute for car parking area. Since in modern world, where space has become a very big problem and in the era of miniaturization its become a very crucial necessity to avoid the wastage of space in modern, big companies and apartments etc. For example, in a space where more than 100 cars need to be parked, it’s a very difficult task to do and also to reduce the w.

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A. What is a search engine? Describe the two types of search engine. B. Define in your own words what “the ethical point of view” means? C. What is the difference between: o Morality and Ethics. o Relativism and Objectivism. Solution A)Search Engine:- It is a Program that searches and identifies items in a database that correspond to keywords or characters specified by the user. We have 2 types of Search Engines:- B)The Ethical point of View:- According to me the Ethical point of view in solmething which focuses more on the ethics which ar being followed throughout the world and sometimes ignore the Facts and Science too. Using Morality in any topic or content if we think it in an ethical view and mainly focusing on the Ethics. C) They both are similarly to each other to an extent. 2.Relativism:-The view that what is morally right or wrong depends on what someone thinks. Thank You for using Chegg....

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Are the following statements True or False? 1)A general partnership must have at least 2 members with each having their potential financial loss in the partnership limited to their individual investment. False 2)The owner of a sole proprietorship has unlimited liability for the company’s debt. 3)A corporation is considered a separate legal entity from its shareholders. 4)Once a corporation has paid taxes on its income, it can be passed on as tax-free dividends to its shareholders. Solution 1)True since it needs to have a minimum of 2 members and share profits and loss based on proportion of investment 2)True since he is the only owner needs to share everything 3)True 4)False , the shareholders also needs to pay taxes on the dividend received.

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A person A is supposed to send information to a person B. The information consists of two digit numbers, including possibilities where the first digit is 0. For example 07. A is allowed to send only one two digit number to the other side. Person B is then asked to recover the two original numbers just from the received number and knowledge of the algorithm person A was using to calculate that number. (a)-Person A calculates the average of the two numbers and then send it two the person B. If the average turns not to be an integer then A rounds it upward. For example if the two numbers are 20 and 29, the average is 24.5 and A would send 25 to B. Now assume that every pair of numbers is equally likely, that is it comes with the probability of 1/10000. We define a random variable X to be the number of possibilities B has to choose from to guess the two original numbers. For example if B receives 03 then there are 13 possibilities, (00,06),(01,05),(02,04),(03,03),(04,02),(05,01),(06,00),(00,05),(01,04),(02,03),(03,02),(04,01),(0 5,00). The problem is to compute the expectation of X. (b)- Same as in (a) but now A is sending the larger of the two numbers. We define a random variable Y to be the number of possibilities B has to choose from to guess the two original numbers. For example if B receives 03 then there are only 7 possibilities, (03,00),(03,01),(03,02),(03,03),(02,03),(01,03),(00,03). Compute the expectation of Y. Comparing the expectations of X and Y which method is better. Solution 198.99.

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1. What are the basic ingredients in concrete? 2. What is the difference between density (solid density) with bulk density? 3. Define initial set and final set. Briefly discuss one method used to determine them. What is a false set and flash set of portland cement? 5. What is meant by air- entraining? 6. What type of cement would you use in each of the following cases a. Construction of a large pier b. Construction in cold weather c. Concrete structure without any specific exposure condition d. Building foundation in a soil with severe sulfate exposure 7. You are an engineer in charge of mixing concrete in an undeveloped area where no potable water is available for mixing concrete. A source of water is available that has some impurities. What tests would you run to evaluate the suitability of this water for concrete mixing? What criteria would you use? 8. Three standard mortar cubes were made using nonpotable water available at the job site, and three others were made using potable water. The cubes were tested for compressive strength after 7 days of curing and produced the failure loads in kips shown in Table P6.23. The Vicat test was conducted on the cement paste made with the questionable water and showed that the set time was 45 minutes more than the set time of paste made with potable water. Based on these results, would you accept that water for mixing concrete according to ASTM standards? Explain why TABLE P6.23 Nonpotable Water 15.8 164 16.6 Potable Water 16.0 18.7 17.4 9. How does the addition of air-entraining materials to Portland cement improve the concrete? 10. How does the fineness of the cement affect the concrete? 11. What natural aggregates are used in making concrete? Solution 1)Concrete and cement are not the same thing; cement is actually just a component of concrete. Concrete is made up of three basic components: water, aggregate (rock, sand, or gravel) and Portland cement. Cement, usually in powder form, acts as a binding agent when mixed with water and aggregates. This combination, or concrete mix, will be poured and harden into the durable material with which we are all familiar. There are three basic ingredients in the concrete mix: Portland Cement Water Aggregates (rock and sand) Portland Cement - The cement and water form a paste that coats the aggregate and sand in the mix. The paste hardens and binds the aggregates and sand together. Water- Water is needed to chemically react with the cement (hydration) and too provide workability with the concrete. The amount of water in the mix in pounds compared with the amount of cement is called the water/cement ratio. The lower the w/c ratio, the stronger the concrete. (higher strength, less permeability) Aggregates- Sand is the fine aggregate. Gravel or crushed stone is the coarse aggregate in most mixes. 2) Density and bulk density are properties of matter, which are very important when it comes to the study of properties of matter. These are defined for substances such as.

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1 pts Question 1 is a method used by anthropologists to collect information by living with and participating in the daily lives of the people that they are studying. It is the best method available to get a holistic understanding of culture and the human condition. fieldwork O participant observation ethnography o ethnology 1 pts Question 2 When an anthropologist studies multiple societies\' similarities and differences before generalizing about human nature, human society, or the human past we call this method analysis reflexive anthropology comparison evolution Solution Ans.1) Participant observation (It is a generally used analytical method of cultural anthropology). 3) Participant observation (The method in which the anthropologist collects data and analyze the result). 5) Critique other culture (The first and foremost aim of anthropology is to analyze the people of different culture on the basis of their language, rituals, behavior etc). 7) Habitus (It is based on individual’s perception about the social world). 10) Ethnocentrism (It is the belief of ethnocentrism that other people, society or culture is inferior to one\'s own)..

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Which sequence describes the order of structures through which air travels in the bird respiratory system? Trachea, bronchus, posterior air sacs, lung, anterior air sacs, trachea, bronchus, anterior air sacs, lung, posterior air sacs, trachea, posterior air sacs, anterior air sacs, bronchus, lung, trachea, lung, anterior air sacs, bronchus, posterior air sacs, trachea How does the respiratory system in birds differ from the mammalian respiratory system? The respiratory system in birds allows exchange of fresh air and stale air in one breath, whereas the mammalian system requires for breaths for this exchange. The respiratory system in birds is less efficient than the mammalian respiratory system. The respiratory system in birds is unidirectional, whereas the mammalian respiratory system is bidirectional. The respiratory system In birds uses air sacs in place of the lungs found in the mammalian respiratory system. What is the function of the air sacs in the respiratory system of birds? To allow mixing of fresh and stale air so that the oxygen/carbon dioxide ratio is optimal To hold air before and after it passes through the lungs so that it moves in one direction To provide a site for gas exchange between the blood and the surrounding air To provide a storage site for holding fresh air that can be drawn from during periods of high metabolic demand Solution 1) c) trachea, posterior air sacs, anterior air sacs, bronchus, lung, trachea 2)d) the respiratory system in birds uses air sacs in place of lungs found in the mammalian respiratory system. Birds have air sacs first and then lungs, unlike mammals. 3)b) to hold air before and after it passes through the lungs so that it moves in one direction. Airsacs are present in birds at the place where unga are present in mammals. These air sacs then send some air to lungs..

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Benifits and Issues using cloud computing, Describe breifly about SaaS, IaaS, PaaS? Solution The benefits of cloud computing are: Issues: Software as a Service (SaaS) is a cloud application service that corresponds to the huge cloud market. It uses web to transfer applications controlled by the third-party seller. These applications can run directly from web browser without downloading. It is easy to maintain and support with SaaS. Examples: Google Apps, Cisco WebEx, Concur etc. Infrastructure as a Service (IaaS) is used for accessing, observing, and managing distant data- center infrastructures, like calculate, storage, networking, and networking services. Instead of buying complete hardware, users can buy IaaS based on usage. Platform as a Service (PaaS), is used for applications and other expansion, whereas providing cloud mechanism to software. PaaS build the development, testing, and operation of applications fast, easy, and commercial. The enterproise PaaS is delivered by hybrid model..

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Where should organisms in Myxomycota be classified? Give characteristics of these organisms which you used to place them in a taxonomic unit and the source you used to find their characteristics. Do NOT copy and paste from any website; do not use any word which you cannot define in your posts. Solution Myxomycota are also called as slime moulds. They are differs from normal fungi because of their vegetative body consists of only protoplast bounded by membrane and devoid of cellwall and also for their phagotrophic mode of nutrition. They are either holocarpic or eucarpic and they exhibit in variable colouration. They are classified in to: Ascariomycetes, Hydromyxomycetes, Myxomycetes and Plasmodiophoroomycetes. They key charecteristics for the above classifications are:.

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