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A charge q= 4.0 μC is moved 0.25 meter horizontally from the origin to point P in a region where an electric field is 150 V/M and directed vertically. Find the change in electric potential energy of the charge?
A fighter plane is launched from aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 2.3 x 105 N. Determine the work done on the jet by the catapult
A hockey puck impacts a goalie's plastic mask horizontally at122 m/h and rebounds horizontally off the mask at 47mi/h. Find the average force that the puck exerts on the mask
A friend whose mass is only 75 kilogram, slides down the similar distance, but the pole force is only 80 percent of the force on his buddy. Determine how long did the second person slide take
A small stone is thrown vertically downward at an initial speed of 14 m/s from a height of 65 meter above the ground. Determine its velocity just before it hits the ground
A student throws a ball vertically upward such that is travels 7.1 meter to its maximum height. Estimate what is the ball average speed
To represent full color images accurately what must desktop publishing systems use
A machine gun, of mass 35.0 kilogram, fires 50.0-g bullets, with a muzzle velocity of 750 m/s, at the rate of 300 rounds per minute. Find the average force exerted on the machine gun mount
Force shutdown a PC
A 2.0 kilogram softball is pitched to you at 20 m/s. You hit the ball back along the same path, and at the same speed. find the magnitude of the average force the bat exerted
A 2.0 centimeter tall object is placed in front of a mirror. A 1.0 tall upright image is formed behind the mirror, 180 from the object. Find what is the focal length of the mirror
A driver in a car travelling at a speed of 58.0 mi/h sees a deer 126 m away on the road. Calculate the minimum constant acceleration that is necessary for the car to stop without hitting the deer (assume that the deer does not move in the meantime).
Mars rotates on its axis once every 24.8 hours. What is the speed of a geosynchronous satellite orbiting Mars
A student is reading a lecture written on a blackboard. Thelenses in her eyes have a refractive power of 62.20 diopters, How far (in meters) is the blackboard from her eyes
A freezer of resistance 9.6 is connected to a 123.3 V source. What is the power delivered when this freezer is on
the angular momentum of a spinning wheel is 235kg. after application of a constant braking torque for2.0s it slows and
A 1 530-kg automobile has a wheel base (the distance between the axles) of 3.30 m. Find the force exerted by the ground on each wheel
A charge of 3.45 µC is uniformly distributed on a ring of radius 9.5 cm. Find the electric field strength on the axis at the following locations. (a) 1.2 cm from the center of the ring N/C (b) 3.1 cm from the center of the ring N/C (c) 4.0 m from ..
a 15.0g plastic ball is dropped from a height of 2.60 m and is moving at 2.80ms just before it hits the floor how much
During a baseball game, a batter approaches the plate. The pitcher hurtles the ball in the direction of the batter at a speed of 85 miles per hour. find the momentum of the system in the center of mass frame
A person bounces up and down on a trampoline, even as always staying in contact with it. The motion is simple harmonic motion, and it takes 2.49 s to complete one cycle. The height of each bounce above the equilibrium position is 38.7 cm.
A 2.20-mol sample of helium gas initially at 300 K, and 0.400 atm is compressed isothermally to 1.00 atm. Find the energy transferred by heat
A 100kg cannon at rest contains a 10kgcannonball. when fired, the cannonball leaves the cannon with avelocity of 90m/s. what is the magnitude of the recoil speed of the cannon
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