Calculate rate of entropy change as flows through condenser
R134a is condensed at a constant temperature of 30°C as it flows through the condenser of a refrigerator by rejecting heat at a rate of 6 kW. Calculate the rate of entropy change of R134a as it flows through the condenser.
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Helium gas expands in an adiabatic turbine from 2 MPa and 750°C to 0.18 MPa at a rate of 1.5 kg/s. Assuming constant specific heats at room temperature, calculate the maximum power output of the turbine.
You throw a ball, m = 2kg from the top of a 30 m cliff, with a initial velocity of 25 m/s at an angle of 50 degrees. a) Using energy considerations, what is the maximum height of the ball?
A researcher wanted to determine if the average waiting time at the emergency room in a local hospital is greater than 60 minutes. He randomly selected 15 patients at the emergency room facility and recorded their waiting times in minutes.
Since the freezing point of a solution depends on the relative number of particles, what would you caclcu;ate to be the freezing point of 0.1 m solutions in water of (a) NaCl, (b) BaCl2? Assume that these salts are 100% ionized in solution.
R134a is condensed at a constant temperature of 30°C as it flows through the condenser of a refrigerator by rejecting heat at a rate of 6 kW.
What is the velocity of A relative to B? (Express your answer in terms of the unit vector I-hat and J-hat, where I-hat is toward the east)
Oxygen at 100 kPa, 27°C is compressed to 1 MPa in an adiabatic compressor whose isentropic efficiency is 0.80. Calculate the oxygen temperature at the compressor outlet is?
The AC storage has an rms voltage of 100.0V and as angular frequency of 10.0*10^3 rads/sec find: (a) Find the resistance of the capacitor and the inductor
In 2003-2011 there are on average 75 days of rain per year. Assume that a year has 365 days, ignore leap years, and that a rainy day occurs randomly and is independent. What is the probability of having two or more rainy days in a 7 day week?
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