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A heat pump has a coefficient of performance equal to 4.35 and requires a power of 1.77 kW to operate.
(a) How much energy does the heat pump add to a home in one hour?
(b) If the heat pump is reversed so that it acts as an air conditioner in the summer, what would be its coefficient of performance?
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler running at a velocity of 4.5 m/s grabs him. find the mass of the receiver
A certain lightbulb is rated at 95 W when operating at an rms voltage of 1.95 V. What is the peak voltage applied across the bulb
A heat engine takes in 111 kJ of heat from a reservoir at 811 K and exhausts 83 kJ to a reservoir at 290 K. What is the efficiency of an ideal engine operating between the same two reservoirs
At the end of the trip she measures the pressure to be 3 105 Pa. Ignoring the expansion of the tires, find out the air temperature inside the tires at the end of the trip.
Sound is coming through an open window whose dimensions are 1.1 m x 0.75 m. How much sound energy comes through the window in one hour
Find the speed and acceleration of an electron in the first two Bohr orbits of the Li++ Ion. Also find the acceleration of an electron in the first two bohr orbital of the H atom.
a street light is supported by two wires and each makes a different angle from each other. the one on the left is 32
A solid cylinder has an area of 10cm^2 and a height of 1.0m. The cylinder is composed of 2 different materials with mass densities of 2000 kg/m^3, what is the mass of the cylinder
A star with an initial radius of 1.00 108 m and period of 30.0 days collapses suddenly to a radius of1.00 104 m. Find the period of rotation after collapse
question1adjust the solution process discussed in class for uniform slow viscous flow past a sphere to the case of flow
A 67-g ice cube at 0°C is placed in 732 g of water at 22°C. What is the final temperature of the mixture
Two objects with masses of 3.80 kg and 5.40 kg are connected by a light string that passes over a frictionless pulley, Determine the distance each object will move in the first second of motion if both objects start from rest
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