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A person pulls a toboggan for a distance of 40.1 m along the snow with a rope directed 21.3 ° above the snow. The tension in the rope is 93.2 N.
(a) How much work is done on the toboggan by the tension force?
(b) How much work is done if the same tension is directed parallel to the snow?
Every year, there is a foot race to the top of the Empire State Building. what was his average power output during the race
An uncharged capacitor is connected to the terminals of a 4 battery, and 12 flows to the positive plate. The 4 battery is then disconnected and replaced with a 7 battery, with the positive and negative terminals connected in the same manner as bef..
The index of refraction of air is 1, the index of glass 1.55 and the index of water 1.33. Characterize the air bubble as a point source.
A circuit contains sic 60 W lamps with a resistance of 240 ohm each and a 10 ohm heater connected in parallel. The voltage across the circuit is 120 V. Find the current in the circuit.
A long, straight wire carrying a current of 3.00 A is placed along the axis of a cylinder of radius 0.500 m and a length of 2.00 m
A power line 50km long has a total resistance of 0.60ohm, What percentage of the original energy is lost when the transformer is not used
The population of a community was 12500 in 1985 and 36000 in 2000. Find the time it takes the population of this town to double
An automobile has a total mass of 1700 kg. It accelerates from rest to 40 km/h in 10 s. Assume each wheel is a uniform 32 kg disk. find the total kinetic energy of the automobile
A 4000 kg lunar lander is in orbit 50 km above the surface of the moon. How much work must the thrusters do
70 grams of water at 85°C are mixed with an equal amount of water at 15°C in a completely insulated container. How much heat is gained by the cold water
A Carnot engine operating between energy reservoirs at temperatures 300K \rm K and 530K K produces a power output of 1200W, What is the rate of heat output
A 100 g meter stick is allowed to pivot about its center. A 1 g bb is shot at the end of the stick (where it is embedded) causing it to rotate, What is the initial velocity of the bb
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