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1. (a) Prove that no 2-temperature refrigerator operating between reservoirs at hotter and colder temperatures Th and Tc has a greater coefficient of performance than a Carnot refrigerator. Use diagrams of the type introduced in the chapter.
(b) Find the minimum amount of electrical energy needed to create 0.50 kg of ice from water at 0 °C in a household freezer that rejects heat to a room at 20 °C.
2. Show that a heat pump with a coefficient of performance COPh greater than a heat pump that operates on a Carnot cycle would violate Clausius' statement of the second law.
1.a company wants to know if minorities are more likely to be in certain job categories than others. their data base
a population is normal with a variance of 17. suppose you wish to estimate the population mean u. find the sample size
In a sample of 55 mice, a biologist found that 42% were able to run a maze in 30 second or less. Find the 90% limit for the population proportion of mice who can run a maze in 30 second or less.
Ccompute the test statistic, and at 95% confidence, test the hypotheses. What is the p-value associated with the sample results? What is your conclusion based on the p-value?
an insurance company issues life insurance policies in three separate categories standard preferred and
A sample of 120 homes sold recently in a big city gave the mean price of homes equal to $270,000 and the standard deviation equal to $70,000. (a) What is the point estimate of the mean price of all homes in the big city?
Represent the following data with a suitable diagram: Index Numbers of wholesale prices. Statistics examination of Bangalore University held in November, I 999 and November, 2000 by means of multiple bars.
The amount of a brand of soda in 12-ounces can is approx. normal with a mean of 12.1 ounces and a standard deviation of 0.15 ounces.
suppose a group of 900 smokers who all wanted to give up smoking were randomly assigned to receive an antidepressant
Find the probability of getting at most 25 lefties assuming that they are chosen with a process designed to yield a 12% rate of lefties.
Construct a 95% confidence interval estimate of the difference in kilometers per liter. Do the results of parts (a) and (b) agree? Explain why or why not.
Make a scatter plot. Do you expect a positive, negative, or zero correlation? Why? Find the correlation coefficient and the equation of the line of best fit and write them down
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