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An air source heat pump with a heating cop of 4 is used to heat a house. The input rating of the heat pump is 3.3 horsepower. Calculate the rate of heat that it can supply to the house. If it works 5 hours per day, how much electrical energy does it use per month?
An industrial laser is used to burn a hole through a piece of metal. The average intensity of the light is S = 1.27 109 W/m2. What is the rms value of each of the following fields in the electromagnetic wave emitted by the laser? (a) the electric ..
What is Rosie's power output. A long, straight wire carries a current of 44 A. The magnetic field produced by this current at a certain point is 8.0 x10-5 T. How far is the point from the wire.
Six grams of helium (molecular mass = 4.0 u) expand isothermally at 320 K and does 9000 J of work. determine the ratio of the final volume of the gas to the initial volume
An object at rest explodes into three peices of equal mass. One moves east at 20 m/s; What is the velocity of the third piece
A converging lens of focal length 7.99 cm is 19.7 cm to the left of a diverging lens of focal length -6.02 cm, Calculate the magnification of the coin's final image
Two charged bodies exert an electrostatic force of 144 N on each other. If the distance between them is quadrupled and magnitude of one charge is cut in half, what is the new force between them.
A charge of 910 C was passed through a wire in 3.10min. What was the average electric current during that interval
monochromatic light strikes a diffraction grating at normal incidence before illuminating a screen 1.93 m away. compute the distance between the two second order maxima?
A rock is dropped off the side of a bridge and hits the water below 5.7 s later. What is the height of the bridge above the water
A hydrogen atom is in the 5d state. What is the magnitude of its orbital angular momentum
A thin film of alcohol (n = 1.36) lies on a flat glass plate (n = 1.51). When monochromatic light, find the minimum thickness of the film
q1. a brick is thrown upward from the top of a building at an angle of 45deg to the horizontal and with an initial
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