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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?
As F is enhancement d, the block would either begin to slide, or begin to tip over. What must be the coefficient of static friction ms so that the block begins to slide rather than tip.
Ships A and B leave port together. For the next two hours, ship A travels at 40.0mph in a direction 20.0 ?west of north while the ship B travels 45.0, What is the speed of ship A as seen by ship B
After the collision (assumed elastic), the second ball is moving along the positive y axis. Elucidate the final direction of the first ball, and what are their two speeds?
Consider a car undergoing these two displacements: D1 (3 km, 4 km) and D2 (4km, -3 km). how far will the car then be from its starting point
A container is filled to the brim with 1.6 L of mercury at 20°C. As the temperature of the container and mercury is increased to 49°C, compute the linear expansion coefficient of the material
An old-fashioned (vinyl) record rotates at a constant rate of 45 rpm. how far does a point on the edge travel
A screw with 15 threads per centimeter is driven 1.01 cm into its fixture in 11.2 s with a cordless electric screwdriver. What is the average angular speed of the screwdriver
How long does it take for the grinding wheel to stop ? Through how many radians has the wheel turned during the interval found in.
An electric motor rotating a workshop grinding wheel at a rate of 8.90 101 rev/min is switched off. Through how many radians has the wheel turned during the interval found in (a)
A lab team rides a ski lift to the top of the mountain, due to some congestion their ears fail to pop, that is the pressure inside the ear does not equalize with the outside atmosphere. Calculate the force on the eardrum
A parallel plate capacitor has a charge of 2.66X 10^-11 C after being charged by a 15 V battery. The plates are seperated by 2.0 mm of air
On a humid day, an electric field of 2.00 * 10^4 N/C is enough to produce sparks about an inch long. Suppose that in your physics class, use Coulomb's law to calculate the electric field at the surface of the sphere
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