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At depths greater than 2 meters in Kansas, the wintertime soil temperature is approximately 15 degrees C. A farmer heats his house with a heat pump using R134a, generating a temperature of 32 deg C at the exit of the compressor. The compressor entrance is saturated vapor at 5 bar, and the compressor has an isentropic efficiency of 0.8. The evaporator is buried at a depth of 2 meters. The condenser exit is saturated liquid, and a throttling valve is used between this and the evaporator. Determine the coefficient of performance.
Your dog is running around the grass in your back yard. He undergoes successive displacements 3.37 m south, 8.45 m northeast, and 13.3 m west. What is the resultant displacement?
A wrecking ball used to knock down buildings has a mass of m = 1250 kg and is suspended from a cable of length L =23 m. what is the highest mass the ball can have
If the weight of a room full of water is so great, why don't the first floors of houses built over basements all collapse as flooded to the ceiling.
After a golf ball is hit it takes off with an initial speed of 20.9 m/s and at an angle of 32.5° with respect to the horizontal. How far would the ball fly if the initial speed was doubled
A 0.700-kg ball is on the end of a rope that is 1.30 m in length. The ball and rope are attached to a pole, determine the tangential speed of the ball
A ball is thrown toward a cliff of height h with a speed of 30m/s and an angle of 60? above horizontal, What was the maximum height of the ball
A proton and an electron are held apart a distance of one meter, Calculate the electric force F between them and Show the electric force vector on each of them
In a period of 1 s, 4.00 x10^23 nitrogen molecules strike a wall with an area of 6.30 cm2. If the molecules move with a speed of 300 m/s and strike wall head-on in elastic impacts, what is the pressure exerted on the wall? (The mass of one N2 mole..
Transverse waves with a speed of 59.0 m/s are to be produced on a stretched string. A 4.95-m length of string with a total mass of 0.0600 kg is used. (a) What is the required tension in the string? N (b) Calculate the wave speed in the string if t..
A person who weighs 624 N is riding a 90.8 N mountain bike. what is the area of contact between each tire and the ground
A 92-kg man's thighbone has a relaxed length of 0.55 m, a cross-sectional area of 6.8 10-4 m2, By how much does the thighbone compress
The dry weight of a man is 845 N. When he is submerged underwater, What is the volume of the man
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