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An electron and a proton are initially very far apart (effectivelyan infinite distance apart). They are then brought together to forma hydrogen atom, in which the electron orbits the proton at anaverage distance of 5.39*10-11 m. What is EPEfinal -EPEinitial, which is the change in the electricpotential energy?
Two disks are rotating about the same axis. Disk A has a moment of inertia of 9.10 kg·m2 and an angular velocity of +8.10 rad/s. What is the moment of inertia of disk B
A ball is thrown vertically upward with an initial speed of 10m/s from the top of a building, at a height of 25m from the ground. How long does the ball take to reach the ground
A long horizontal hose of diameter 3.2 cm is connected to a faucet. At the other end, there is a nozzle of diameter 1 cm. detetmine the velocity of the water in the hose
A particle undergoes three successive displacements in a plane, as follows: 3.50 m southwest, 4.50 m east, and 6.00 m in a direction 60.0° north of east. How do you find the components of the first displacement
A string 1.9 m long with a mass of 2.6 g is stretched between two fixed points with a tension of 80 N. Find the frequency of the fundamental on this string
A 1,030-kg car is pulling a 285-kg trailer. Together, the car and trailer have an acceleration of 2.00 m/s2 in the positive x-direction. determine the force exerted by the trailer on the car
You are the technical consultant for an action-adventure film in which a stunt calls for the hero to drop off a 22.7-m tall building, What is the angular acceleration of the drum
The wattage of a commercial ice maker is 212 W and is the rate at which it does work. The ice maker operates just like a refrigerator and has a coefficient of performance of 3.60. The water going into the unit has a temperature of 16.0°C, and the ..
An unmarked police car, travelling a constant 94 km/h, is passed by the speeder travelling 153 km/h. precisely 0.70 s after the speeder passes, policeman steps on the accelerator. If the police car's acceleration is 2.30 m/s^2, how much time elapses ..
Assume you weight is 128 lb. Compute your weight in N. Compute your mass in kg. Compute your mass in slugs
A black wood stove with surface area 4.6 \rm{ m^2} is made from cast iron 4.0 \rm mm thick. What is the rate of heat conduction through the stove wall
A car has its 0.45m long radio antenna oriented vertically upward and is traveling at highway speeds of 70 mph. Calculate the range of induced emf on the antenna
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