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A 50.0 g ball of copper has a net charge of 1.7 µC. What fraction of the copper's electrons have been removed? (Each copper atom has 29 protons, and copper has an atomic mass of 63.5.)
In an emergency situation, a person with a broken forearm ties a strap from his hand to clip on his shoulder. find the tension in the strap
A spool of thin wire rotates without friction about its axis. A man pulls down on a wire connected to an inner radius with force of 16.10 N. How long does it take to enlarge the angular velocity of the spool from 11.00 rad/s to 39.00 rad/s? Icm = ..
A person in a car is driving down a straight road. The instantaneous acceleration is decreasing with time, What is happening to the speed of the car
A source delivers an AC voltage of the form ?v = 92.2 sin (60?t), Find the rms voltage of the source
A projectile is ?red into the air from ground level over level ground. The initial speed of the projectile is 30 m/s, Where does the center of mass of the projectile land
A sample of wood from an archaeological excavation is dated by using a mass spectrometer to measure the fraction of 14C atoms. What is the wood's age
A glass is half-full of water, with a layer of vegetable oil (n = 1.47) floating on top. Determine the critical angle for the oil-water interface
A farsighted man uses eyeglasses with a refractive power of 1.95 diopters. Wearing the glasses 0.02 m from his eyes, What is the correct contact lens prescription, in diopters
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 18.0 cm, Find the electric field just outside the paint layer
The electric field inside a 28.41-cm-long copper wire is 0.021 V/m. What is the potential difference between the end of the wire
A photon with wavelength 0.02680 nm strikes a free electron that is initially at rest. What is the de Broglie wavelength of the electron after its collision with the photon
Consider the arrangement shown in the figure below. Assume R = 4.00 ? and scripted l = 1.40 m, At what speed should the bar be moved
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