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The moon is a satellite that orbits the earth at a radius of 3.85 108 m. The mass of the earth is 5.98 1024 kg. What is the orbital speed of the moon?
Two protons are moving directly toward one another, When they are very far apart, their initial speeds are 2.77 106 m/s. What is the distance of closest approach
Sam (85 kg) takes off up a 50-m-high, 10° frictionless slope on his jet-powered skis. The skis have a thrust of 240 N. He keeps his skis tilted at 10° after becoming airborne. How far does Sam land from the base of the cliff.
Consider a swinging pendulum with length l= 10 cm, a mass of 1 gm swinging at the end of it with an amplitude, Calculate the total energy ( potential plus kinetic) in ergs of the swinging pendulum
A diesel engine does not use spark plugs to ignite the fuel and air in the cylinders. at the place of, the temperature required to ignite the fuel occurs because the pistons compress the air in the cylinders.
An ac generator with a frequency of 1.54kHz and an rms voltage of 22.2V is connected in series with a 1.90k, What is the power factor for this circuit
Three liquids are at temperatures of 5.0°C, 21°C, and 33°C, respectively. Equal masses of the first two liquids are mixed, Find the equilibrium temperature when equal masses of the first and third are mixed
A stick of mass m and length L spins with frequency w around an axis, What is the tension in the string, and what is the force that the pivot applies to the stick
A 10 cm long thin glass rod is uniformly charged to +50 nC. A small plastic bead, charged to - 4.8 nC, is 4.2 cm from the center of the rod. What is the magnitude of the force of the bead.
At some automobile toll-collecting stations, the thin metal wire sticks up from the road and makes contact with cars before they reach the toll collector. What is the reason of this wire.
A car drives straight off the edge of a cliff that is 58 m high. The police at scene of the accident observed that the point of impact is 121m from the base of cliff. How fast was the car traveling when it went over the cliff.
The speaker coil consists of 100 turns of wire, 2cm in diameter. The current in the speaker will be 1.6 A when the force on the speaker coil is 14.8 N. What strength magnetic field will give this force.
It is proposed that future space stations create an artificial gravity by rotating. Suppose a space station is constructed as a 1600-m-diameter cylinder, What rotation period will provide "normal" gravity
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