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A ball bearing is dropped from rest at a point A. At the instant it passes a mark 4.7 m below A, another ball bearing is released from rest from a position 5.7 m below A. At what time after its release will the second ball bearing be overtaken by the first?
What is Rosie's power output. A long, straight wire carries a current of 44 A. The magnetic field produced by this current at a certain point is 8.0 x10-5 T. How far is the point from the wire.
a ball with a mass of 10g is swung in a horizontal circular path on a string of length 0.5m. if the balls speed is 4.5m/s, estimate the centripetal acceleration
A 2920 kg satellite used in a cellular telephone network is in a circular orbit at a height of 800 km above the surface of the earth. What fraction is this force of the satellite's weight at the surface of the earth
A person pushes on a stationary 125 N box with 64 N at 30 deg below the horizontal, What is the force friction on the box
A spherical shell has an outside radius of 2.45 cm and an inside radius of a. The shell wall has uniform thickness and is made of a material with density 4.74 g/cm3. What is this maximum mass
A 19.00kg lead sphere is hanging from a hook by a thin wire 3.40m long, and is free to swing in a complete circle. What must be the minimum initial speed of the dart
What mass of stone is necessary if the temperature is not to drop below 18.5°C overnight. Sunlight shining in during the daytime is absorbed by the floor, interior walls, and objects in the room, raising their temperature to 37.5°C.
A 100 Ohm resistor dissipates heat to its surroundings, isothermally. The resistor maintains a constant temperature of 300 K. What is the change in entropy of the resistor
During a lightning storm, it is best not to be the highest pointaround (like standing up in a flat open area) or standing nearsomething tall (like a tree). Why not?
Joe is 0.500 m from the right end and weighs 920-N. Given that the scaffold is in rotational and translational equilibrium, what are the forces on each cable.
A 35.0-g bullet moving at 475 m/s strikes a 3.2-kg bag of flour that is on ice, at rest. The bullet passes through the bag, leaving at 225 m/s. How fast is the bag moving while the bullet exits.
Two stars 19 light-years away are barely resolved by a 165 cm (mirror diameter) telescope. How far apart are the stars
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