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Consider a solid sphere of radius 27 cm, at a temperature of 61 degrees Celsius. Suppose the sphere is completely enclosed in vacuum by a vessel whose walls are kept at -38 degrees Celsius. What is the power radiated (in watts) by the sphere? For simplicity, assume the sphere and the vessel are both ideal blackbody radiators, with emissivity e = 1.
The string changes from horizontal to vertical as it passes over a solid pulley of diameter 6.0cm. The pulley is free to turn on a fixed smooth axle. The vertical section of the string supports a 400 g object. The string does not slip at its conta..
In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotati..
A 5.0 g bullet leaves the muzzle of a riffle with a speedof 320 m/s. What force (assumed constant) is exerted on the bulletwhile it is traveling down the 0.82 m long barrel of the riffle?
In a pool game, the cue ball, which has an initial speed of 3.0 m/s, make an elastic collision with the eight ball, which is initially at rest. Find the direction of motion of the cue ball after the collision
a 2.00kg block hangs from a spring. a 300g body hung below the block stretches the spring 2.00cm farther. a what is the
A 6.00 bullet is fired horizontally into a 1.30wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.200. What was the initial speed of the bullet
Suppose you cycle 10.0 km to the east and 15.0 km north to get to a shopping mall from home. what is the direction the the pigeon should fly and how far must it travel to get home in the shortest time
A nearsighted person wears glasses to correct the problem. How far in cm from the eyes is the person's far point located
A string fixed at both ends is 8.98 m long and has a mass of 0.125 kg. It is subjected to a tension of 92.0 N and set oscillating. find the longest possible wavelength for a standing wave
An electric fan is running on HIGH. After the LOW button is pressed, the angular speed of the fan decreases to 85.0 rad/s in 1.76 s. Determine the initial angular speed of the fan
An artillery shell of mass 10.00 kg, lying at rest on the ground, accidentally detonates, exploding into three pieces of shrapnel. What is the speed of the third piece of shrapnel
An alpha particle, the nucleus of a helium atom, has a mass of 6.7*10-27 kg and a charge of 3.2*10-19C. It floats at rest above a charged horizontal sheet with uniform charge density on its surface.
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