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A 0.22-kg ball on a stick is whirled on a vertical circle at aconstant speed. When the ball is at the three o’clockposition, the stick's tension is 17 N. Find the tension in the stick when the ball is (a) at the twelveo’clock and (b) at the sixo’clock positions.
A dam is used to block the passage of a river and to generate electricity. Approximately 5.73 x 10^4 kg of water fall each second through a height of 19.6 m. I one half of the gravitational potential energy of water were converted to electrical energ..
a women a toddler pushes a chair at a constant speed with a force of 25.0n for a distance of 2.5m. how much work is the
A brass plate with a thickness of 1.00 cm is placed over a copper plate with a thickness of 2.00 cm, What is the effective coefficient of thermal conductivity for the brass - copper layer
An ac voltage source is connected in series with a1.4-?F capacitor and a 690-? resistor. Using a digital ac voltmeter, the amplitude of the voltage source is measured to be 4.0?V rms, Determine the frequency of the ac voltage source
a the harmonic oscillator can be used as a model for the vibrational motion of a diatomic molecule. describe the
An object with mass m1 = 5.90 kg, rests on a frictionless horizontal table and is connected to a cable that passes over a pulley, Find the magnitude of the acceleration of each object
An electron is moving north in a region where the magnetic field is south. What is the magnetic force exterted on the electron
Two large, parallel, conducting plates are 17 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces, Find the electric field at the position of the electron
A town is installing a new 10” main to carry drinking water. The only section remaining to be installed is a segment through the middle of town. Calculate the length of pipe required for the pipe system.
A factory worker pushes a crate of mass 32.0kg a distance of 4.85m along a level floor at constant velocity by pushing horizontally on it. How much work is done on the crate by this force
The side of a hollow cubical box is 0.4 m. The box floats in ariver with one fourth of it's height beneath the surface. what is the depth of the liquid in the box at the instant the box begins to sink
question two square oppositely charged conducting plates measure 33 cm on each side. they are placed close together and
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