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Using a heat pump to heat up a house: How much energy do you have to pay in order to add 100 J of heat to the inside of a house with a heat pump which has a coefficient of performance of 17? Please show work step by step and explanation
A skier is gliding along at 5.0 m/s. On horizontal, frictionless snow. He suddenly starts down a 11 degree incline. His speed at the bottom is 15m/s.
One of the steps of brewing beer at home involves removing the beer from one vat and placing it into a second vat while leaving both floating impurities and bottom sediments behind. This is done with using a siphon, a tube that is positioned and then..
A dockworker loading crates on a ship findsthat a 18 kg crate, initially at reston a horizontal surface, requires a 78N horizontal force to set it in motion. However, after the crate isin motion, a horizontal force of 56 Nis required to keep it m..
A long, current-carrying solenoid with an air core has 1750 turns per meter of length and a radius of 0.0175 m. What is the mutual inductance of this system
Two passenger trains A and B, each 220 m long, pass a 50 m long railroad platform in Winnepeg. The trains are moving in opposite directions at equal speeds of 0.670c with respect to the ground, What is the difference in arrival times
How much will the arrow miss if the archer stands 50 meters from the target?
A sprinter running the 100 m dash has a constant acceleration of 3.0 m/s2 for the first 3.5 seconds of the race, How long does it the sprinter to run the race
A car travels at a constant speed around a circular trackwhose radius is 2.6 km. find the magnitude of the centripetal acceleration of the car
A man on a tower 49 meter high drops a stone. One second later he throws a second stone after the first. Find with what speed did he throw the second stone
Estimate the power radiated by the human body. Be sure to state the estimated values of all relevant quantities. You need only outline your calculations. How does this value compare with the average caloric intake for humans?
A girl hits a puck, giving it an initial velocity of 6m/s. If the coefficient of kinetic friction is 0.050, how far will the puck slide before stopping
A spherical virus has a diameter of 50 nm. It is contained in a long, narrow cell of length 1 x 10-4 m. What uncertainty does this imply for the velocity of the virus along the length of the cell? Assume that the virus has a density equal to that of ..
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