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The pulley system in Figure below is used to lift a 52-kg crate. Note that a chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assuming the masses of the chains, pulleys, and ropes are negligible, determine
(a) the force required to lift the crate with constant speed and
(b) the tension in each chain.
A microscope uses an eyepiece with a focal length of 1.65 cm . Using a normal eye with a final image at infinity, What is the magnification of the microscope
A communications satellite with a mass of 400 is in a circular orbit about the Earth. The radius of the orbit is 2.8×10^4 as measured from the center of Earth. Compute the weight of the satellite on the surface of the earth.
A cube is constructed of six copper plates joined at the edges by an insulating material. find the electrical potential in the center of the cube
A man drags a 72.0 kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. The crate is tilted 26 degrees above the horizontal, and the strap is inclined 68 degrees above the horizontal. The center ..
A plane is flying southwest at 155 mi/h and encounters the wind from the west at 45mi/h? what is the planes new velocity with respect to the ground in standard position.
Hydraulic engineers often use, as a unit of volume of water, the "acre-foot", defined as the volume of water that will cover 1 acre of land to a depth of 1 ft. A severe thunderstorm dumps 3.0 in. of rain in 30 min on a town of area 30 km2. What vo..
What minimum horsepower must a motor have to be capable to drag a 290 box along a level floor at a speed of 1.05 if the coefficient of friction is 0.50.
You find an unlabeled box of fine needles, and want to determine how thick they are. A standard ruler won't do the job, What is the diameter of the needle
During a ride on the gravitron, a person finds herself stuck against the wall as she spins around with a frequency of 26.00 rpm, What is the diameter of the gravitron ride
A board, with a mass m = 20.0 kg and a length of 4.00 m, is supported by two identical vertical connected to the ends of the board, What are the tensions in the two ropes
A certain amount of work is required to stretch spring A a certain distance. Compare the spring constants of the two springs
What is value of Earths magnetic field
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