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A free electron is placed between two large, parallel, nonconducting plates that are horizontal and 2.90 cm apart. One plate has a uniform positive charge; the other has an equal amount of uniform negative charge. The force on the electron due to the electric field between the plates balances the gravitational force on the electron. What are
(a) the magnitude of the surface charge density on the plates and
(b) the direction of (1 = up, 2 = down)?
a monochromatic beam of x-rays with a wavelength of 0.280 nm is scattered by a metal foil. what is the observed scattering angle
You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 14.6 m above the ground, Use the work-energy theorem to find its speed just as it left the ground
question1in the relativistic heavy ion collider in brookhaven ny physicists are attempt to rebuild the conditions of
At the 18th green of the U. S. Open you need to make a 20.5 ft putt to win the tournament. Assuming the deccelration caused by the grass is constant, what should the initial speed have to be to make the putt
Two ships are moving along a line due east (see figure below). The trailing vessel has a speed relative to a land-based observation point of v1 = 59.5 km/h, What frequency is monitored by the leading ship
A 140-m-wide river flows due east at a uniform speed of 3.9 m/s. A boat with a speed of 7.8 m/s relative to the water leaves the south bank pointed in a direction 39o west of north. How long does it take for the boat to cross the river
A wire, of length 250 centimeters, and radius 0.3 millimeters is stretched by hanging on a weight of 12 kilograms, Calculate the value of Young's modulus for the wire
During a circus performance, a 70.3-kg human cannonball is shot out of an 15.4-m-long cannon. determine the average net force exerted on him in the barrel of the cannon
A small loop of area A=7.4 mm^2 is inside a long solenoid that has n=747 turns/cm, find the amplitude of the emf induced in the loop
A 5.50kg mass traveling at 3.5 m/s on a fricktionless tabled suddenly collides, What will be the maximum compression of the spring after the composite collides into it
An astronaut weighs 275 lbs with equipment here on the surface of the earth. If he goes to a planet where the acceleration of gravity is 12.5 ft/s/s, What will be his mass be there
A uniform diving board, of length 5.21 m and mass 50.4 kg, is supported at two points; What is the force acting on the board due to the right support when a diver of mass 62.9 kg stands at the end of the board over the water
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