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A 100-W lightbulb has a resistance of about 12Ω when cold (12 C) and 140Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature when hot assuming an average temperature coefficient of resistivity a =0.0060 (C)
After hitting a long fly ball that goes over the right fielder's head and lands in the outfield, how much work was done on the player by friction
A sine wave is traveling along a string. The time for a particular point to move from maximum displacement to zero is 0.880 s. What is the period?
A 0.700-kg ball is on the end of a rope that is 2.40 m in length. The ball and rope are attached to a pole and the entire apparatus, What is the tangential speed of the ball
What is the saturation activity of 24Na that can be induced in a 400 g sample of NaCl with a constant thermal-neutron fluence rate of 5 x 1010 cm-2 sec-1
A horizontal spring with a spring constant of 0.6 N/m sits on a frictionless table, What is the magnitude of the elastic force on the mass just after it is released
A 0.20 {rm kg} rock is thrown vertically upward from the top of a cliff that is 31.0 {rm m} high. While it hits the ground at the base of the cliff, the rock has the speed of 31 {rm m/s}. Assume that air resistance can be ignored; find the initial sp..
An electrical cable consists of 184 strands of fine wire, each having 3.47 µ? resistance. What is the resistance of the cable
A block is released from rest at the top of a frictionless ramp (inclined plane) that makes an angle of 25° with respect to horizontal. What is the length of the ramp D1
Find the angular acceleration - What is the torque on the rod when it makes an o angle q with the vertical - Find the kinetic energy of a solid sphere of mass 0.5 kg and radius 10 cm that rolls without slipping on level ground
An incompressible fluid is flowing through a pipe with a constriction. The pipe is on an incline with an angle of 30.0 degrees. What is the pressure in the narrow section of the pipe
A 11.0-g bullet is fired horizontally into a 102-g wooden block that is initially at rest on a frictionless horizontal surface, what was the speed of the bullet at impact with the block
Ball 1, with a mass of 150g and traveling at 10.0m/s , collides head on with ball 2, which has a mass of 300g and is initially at rest. What are the final velocities of each ball if the collision is perfectly elastic? What are the final velocities of..
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