Find temperature as leaves valve-no change in kinetic energy
Saturated vapor at 400 Kia flowing in a line is taken out through a valve to 100 kpa. What is the temperature (in C) as it leaves the valve assuming no changes in kinetic energy and no heat transfer?
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Scores on a certain test are normally distributed and a researcher wishes to estimate the mean score achieved by all students on the test. He was told that he would need a sample size of 100 to assure a 95 percent confidence interval with width=4.
Hydraulic engineers in the United States often use, as a units of volume of water, the acre-foot, defined as the volume of water that will cover 1 acre (where 1 acre = 43560 ft2) of land to a depth of 1 ft. A severe thunderstorm dumped 2.6 in. of
With what instrument could the predictive validity of a metric scale (a set of questions) best be determined?
King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 52 m/s and at an angle of 34°. A second cannonball that was accidentally dropped hits the moat below in 1.0 s. (a) How tall is the top o
Calculate the probability that a specific bus (say, line 34) passes from the bus stop in the next 10 minutes. Then, calculate the probability that the mean of all the buses is less than 10 minutes. Explain the result, does it make sense?
In water, without the enzyme, the reaction proceeds with a rate constant of 0.039s^-1 at 26C. In the presence of the enzyme in water, the reaction proceeds with a rate constant of 1.0 x 10^6 s^-1 at 26C.
The average daily usage is 10,000gal. If water is added to the tank at an average rate of 5000[exp(-t/20days)] gallons per day, where t is time in days, for how many days will the tank contain water?
In a Mossbauer effect experiment, the change in frequency of a 3.5 x 10^18 Hz electromagnetic wave can be detected if the source and absorber have a relative speed of 0.03 mm/s with respect to each other. Calculate the frequency shift v-vo for mot
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If a child's achievement is below what would be expected given their level of intellectual functioning (as derived from an IQ test such as the WISC-IV)
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