Determine the systems thermal efficiency
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The current in an RL circuit is zero at time t = 0 and increases to 75% of its final value in 4.5 s. The time constant of this circuit is approximately
A hollow metal cube with sides 100mm floats at the interface between a layer of water and a layer of SAE 10W oil such that 10% of the cube is exposed to the oil.
What is the initial pressure of the gas? What is the final temperature of the gas assuming the heat capacity is a constant?
What is the shape, mean(expected value), and standard deviation of the sampling distribution of the sample mean for samples of size 40?
Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kPa and 17 degrees Celcius. This system uses a regenerator as well as reheating and intercooling.
An LR circuit has a resistance R = 25 W, an inductance L = 5.4 mH, and a battery of EMF = 9.0 V. How much energy is stored in the inductance of this circuit when a steady current is achieved?
A minute later, the current is only 0.81 A. What is the temperature T (in degrees C) of the filament at that time? The voltage driving the lightbulb filament stays the same as the filament heats.
Compute and explain a 99% confidence interval estimate of the population mean number of unoccupied seats per flight
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