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Refrigerant 134a undergoes a process for which the pressure-volume relation is P?n = constant. The initial and final states of the refrigerant are fixed by P1 = 200 kPa, T1 = -10°C and P2 = 1000 kPa, T2 = 50°C, respectively. (a) Draw a T- v diagram, label the saturated temperature, the specific volumes and the temperatures of both the initial and final states. (b) Determine the work done during this expansion process, in kJ/kg. (c) Calculate the amount of heat that transferred into R-134a, in kJ/kg.
the distribution of heights of adult males is normally distributed with mean 68 inches and standard deviation 2.9
Estimate the total number of cases sold along with the standard error of your estimate. Estimate the average number sold per supermarket, along with the standard error of your estimate.
an advertisement for a popular weight loss clinic suggests that participants in its new diet program lose on average
if a set of grades on a statistics examination is approximately normally distributed with mean of 74 and a standard
What is probability that all specimen of one of the two types of rock are selected for analysis?
Assume a business researcherwishes to test hypothesis that greater proportion of marketing managers keep track of such obligations.
Treatment conditions and obtains 30 scores in each treatment. If the researcher used a repeated-measures design, then how many individuals participated in the research study?
A researcher finds that of 1,000 people who said that they attend a religious service at least once a week, 31 stopped to help a person with car trouble. Of 1,200 people interviewed who had not attended a religious service at least once a month, 22 s..
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 10 antennas, find the probability that:
Verify that middle class families allocate a statistically larger average amount on food than poor families using the firm's data. Use a 5% significance level in your verification.
The relationship between extraversion, cognitive skills, and communication ability on sales performance
If he were to conduct a second study to reduce the maximum error of estimate to 6, about how many hard drives should he include in his new sample?
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