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A barber's chair with a person in it weighs 2100N. The output plunger of a hydraulic system begins to lift the chair when the barber's foot applies a force of 55N to the input piston. Neglect any height difference between the plunger and the piston. What is the ratio of the radius of the plunger to the radius of the piston?
two 1.3kg masses are 1.2m apart (center to center) on a frictionless table. Each has + 9.2?Cof charge, What is the magnitude of the electric force on one of the masses
Calculate the the electrical repulsion that each bag exerts on the other. Imagine two 2.0{\rm g} bags of protons, one at the earth's north pole and the other at the south pole.
A defibrillator is used during a heart attack to restore the heart to its normal beating pattern, How many electrons pass through the wires connected to the patient
three equal point charges each with charge 1.75mc are placed at the vertices of an equilateral triangle whose sides
A 15.0 kg bucket of water is suspended by a very light rope wrapped around a solid uniform cylinder 0.300 m in diameter with a mass of 12.0 kg. What is the tension in the rope while the bucket is falling
A 750 air-track glider attached to a spring with spring constant 10.5 is sitting at rest on a frictionless air track. What is the amplitude of the subsequent oscillations
Two ice skaters, with masses of 50.0 kg and 85.0 kg, are at the center of a 60.0 m-diameter circular rink. how long does the lighter skater take to reach the edge
An element of mass 92 amu (1 amu = 1.66x10-27 kg) moves in a mass spectrometer where the magnetic field is always 7T, What is the radius you would measure for this element
A heat engine operates between a reservoir at 28°C and one at 432°C. What is the maximum efficiency possible for this engine
The work done by an engine equals one-half the energy it expels to a cooler at 0C. what is the temperature of the heater
A person lifts a 5kg cement block a vertical distance of 2.3m and after that aeries the block horizontally a distance of 6m. Determine the work completed by the person and by the force of gravity in this process.
question1in an assembly operation a robot moves an object first straight upward and then also to the east around an arc
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