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The maximum permitted strain amplitude that would allow a component to survive 1000 cycles under fully reversed plastic loading is approximately(C=0.21,c=0.5)?
Water vapor initially at 3.0 MPa and 300oC (state 1) is contained within a piston-cylinder assembly. Determine the specific volumes at states 1, 2, and 3 in cm3/g and the quality at state 2.
It is known that the standard deviation of the population is $36,000. Using a 1% level of significance, test to determine if there has been a significant decrease in the average price homes. Use the
Suppose that X represents a single observation from the distn given by f(x; theta) = theta*x^(theta - 1) for 0 < x < 1. Find the most powerful test with significance level alpha = 5% to test Ho:
The average monthly rent for a one-bedroom home in San Francisco is $1,429. A random sample of 20 one-bedroom homes about 15 miles outside of San Francisco had a mean rent of $1,550. The population
What total number of replications is required to increase the precision of the estimate and reduce the confidence interval half-length to 1.5 for the same 95% confidence level?
The average movie admission price for a recent year was $7.18. The population variance was $3.81. A random sample of 15 theater admission prices had a mean of $8.02 with a standard deviation of 2.08
What is the maximum peak acceleration of the ejection pulse applied to the pilot? assuming that the seated pilot of 160lb can be modeled with a spinal spring stiffness of k = 450 lb/in.
They are now thermally connected by a reversible heat engine cooling air tank and boiling the water to saturated vapo. Find the required amount of air and the work out of the heat engine.
A sample of 30 cookies is taken to test the claim that each cookie contains an average of at least 9 chocolate chips. The average number of chocolate chips per cookie in the sample was 7.8 with a sa
Use the p value approach. Make sure to show all parts of the test, including hypotheses, test statistic, decision rule, decision and conclusion.
How many degrees of freedom will you use? Draw the null distribution and include the critical values and the test statistic.
A residential heat pump with a coefficient of performance of 2.2 delivers energy to the dwelling at a rate of 23 kW. Determine the net power required to operate the heat pump, in kW.
Is there sufficient evidence to indicate that customers are left on hold for an average length of time greater than 22 seconds? Use a 5% level of significance.
Heat transfer from a certain stationary system occurs at a rate of 10 kW. If the system performs work at a rate of 27 kW. What is the time rate of change of energy within the system in kW?
A biologist has found that 40% of all brown bears are infected with trichinosis. 10 brown bears are tested for trichinosis.
The correlation between GPA and number of Facebook friends is -0.686. Use the correlation and signficance level of 5% to test for a negative linear association between GPA and number of Facebook fri
Determine (a) Compression Ratio. (b) p,V and T at four corners (c) Entropy change during heat addition (d) Work cycle (e) Heat rejection (f) Power of engine (g) sketch p-V and T-s diagram?
A university dean wishes to estimate the average number of hours that freshmen study each week. The standard deviation from a previous study is 2.6 hours. How large a sample must be selected if he w
The cylinder volume is 2000 cm^3 before compression, and the intake air is at 100kpa and 30Centigrade. If the heat addition is 900 kj/kg. Determine (a) Work cycle or power (b) Heat rejected?
An irate student complained that the cost of textbooks was too high. he randomly surveyed 36 other students and found that the mean amount of money spent for textbooks was 121.60. If the standard d
A manufacturer of computer hard drives claims a failure rate of 5% or less during the first three years of operation. For a sample of 100 drives, 9 failed during the first three years of operation.
In a sample of 1000 voters, 520 plan to vote for candidate A. Find the 95% confidence interval for the percent in favor of candidate A
What is the spring rate? What is the distance between the hook ends if the spring is extended until the stress just reaches the yield strength?
Determine the specific volume by using the principle of corresponding states. Determine the density of refrigerant- 12 at 3 MPa and 200 celsius by using the principle of corresponding states.