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The cooling circuit of an air conditioning system is a heat exchanger and the outside air passes. The air flow is 40 cubic meters / min, enters a40 ° C, 1.1bar, and exits at 20 ° C, 1 bar.The R-12 enters the tubes with a quality of 40% and 10 º C and leaves as saturated vapor at 10 ° C. Ignoring the heat transferbetween the exchanger and the environment, and neglecting the effects of kinetic and potential energy, determine to a steady state.
a) The mass flow of refrigerant in kg / min
Runner A is initially 4.0mi west of a flagpole and is running with a constant velocity of 2.0 mi/h due east. How far are the runners from the pole when they meet
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Two masses traveling at the same speed v0 collide head on. Nothing is known about collision other than that it is not completely inelastic.
A 2.1 kg solid sphere ( I= 0.4mR2 ) rolls along a horizontal surface with a speed of 7.8 m/s. What is the total kinetic energy of the sphere
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A particle of mass M is subjected to a force F(t) = kte-alphat, where k is a constant and alpha = 0.5 s-1. If the particle is initially at rest, calculate the position, velocity and acceleration as a function of time.
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. What is the net charge of all these electrons
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