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The filament of a light bulb has a temperature of 2.96E+3 °C and radiates 50 watts of power. The emissivity of the filament is 0.376. Find the surface area of the filament.
A car of mass = 800 travelling at 45.0 enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and the car's tires. What is the radius of the turn if = 20.0 (Assume the car continues in unif..
Two small nonconducting spheres have a total charge of 94.1?C. When placed 1.07 m apart, the force each exerts on the other is 10.5 N and is repulsive. What is the (larger) charge on the spheres? What is the (smaller) charge on the other sphere? What..
Your personal stereo is in a dead spot caused by direct reception from an FM radio station at 91.9MHz interfering with the signal reflecting off a wall behind you.How much farther from the wall should you move so that the interference is fully constr..
Two electrodes are placed in a calcium chloride solution and a potential difference is maintained between them. what is the current in the solution
Between each pair of vertebrae in the spinal column is a cylindrical disc of cartilage. How far does the top surface move relative to the bottom surface
A 211kg rock sits in full sunlight on the edge of a cliff 4.90m high. The temperature of the rock is 30.2?C. what is the final temperature of the rock-water system
A ball is launched from a height of 7.94 ft above the ground with a speed of 16.95 m/s at an angle of 34.48 degrees from the horizontal
A 13g bullet traveling 221 m/s penetrates a 2 kg block of wood and emerges cleanly at 160 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges.
A thick layer of oil is floating on the surface of water in a tank. A beam of light traveling in the oil is incident on the water interface , What is the refractive index of the oil
A disk of radius 215 cm rotates about its axis. Points on the disk\'s rim undergo tangential acceleration of magnitude 1.13 m/s2. At a particular time the rim has a tangential speed of 1.77 m/s. At a time 0.907 seconds later, what is the tangential s..
A 200 keV electron strikes a copper target and is brought to rest producing a single X-ray photon. What is the Compton scattering angle relative to the direction of the incident X-ray
A 55-kg swimmer is standing on a stationary 210-kg floating raft. The swimmer then runs off the raft horizontally with a velocity of +4.6 meter per second relative to the shore. Calculate the recoil velocity that the raft would have if there were ..
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