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Imagine removing one electron from every atom in a tiny cube of gold 1 mm on a side. (Never mind how you would hold the resulting positively charged cube together.) Do the same thing with another such cube a meter away. What is the repulsive force between the two cubes? Density of gold is 19.3g/cm^3 and has a molecular weight of 197 (197 g/mol)
A ball is thrown straight up with a velocity of 18.0 m/s from the edge of the top of a building 30 meters tall. What is the balls velocity just before striking the ground
A ball of mass M = 17 kg is suspended from a vertical inextensible string of length l = 1.5 m. A bullet of mass m = M/2 traveling with a horizontal velocity v = 9sqrt(g*L) collides with the ball, What is the velocity of the ball-bullet system
A vertical straight wire carrying an upward 30?Acurrent exerts an attractive force per unit length of 5.5×10?4N/m, What current (magnitude) flows in the second wire
An x-ray photon of 0.13 nm strikes a metal and undergoes Compton scattering of the electrons in the metal. find the wavelength of the scattered photon
A car is towing a boat on a trailer. The driver starts from rest and accelerates to a velocity of 12.0 m/s in a time of 25.0 s. What is the acceleration of the car and trailer
2 crewmen pull a raft, 1 crewman pulls with a force of 130 newtons at 34 degreees relative to the forward position on the raft. the 2nd crewman on the opposite side pulls at 45 degrees. Illustrate what force should the 2nd crewman pull so that the..
A small piece of dust of mass m = 1.50g travels horizontally through an electric air cleaner in which the electric field is 498N/C. The electric force on the particle is equal to weight of the particle.
The image produced by a concave mirror is located 25 cm in front of the mirror. How far in front of the mirror is the object located
A batted baseball leaves the bat at an angle of 33.0 above the horizontal, How high does the ball rise above the point where it struck the bat
A pump is required to lift 750 liters of water per minute from a well 17.0m deep and eject it with a speed of 19.0, How much work per minute does the pump do
A light-bulb of power 40 Watts is operating with a potential difference of 120 V across it. What is the current and resistance of the filament
A laser used in cutting or drilling metals produces 10 ns pulses at 1.00 J per pulse. What is the peak power of each pulse
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