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A parallel plate capacitor with plates of area 620 cm.^2 is charged to a potential difference V and is then disconnected from the voltage source. When the plates are moved 0.3 cm. farther apart, the voltage between the plates is increased by 117 V. What is the charge on the positive plate of the capacitor?
The bolts on a car wheel require tightening to the torque of 90 N•m. If a 30 cm long wrench is used, what is the magnitude of the force necessary when the force applied at 53° to the wrench.
A skateboarder shoots off a ramp with a velocity of 5.1 m/s,directed at an angle of 59° above the horizontal. The end ofthe ramp is 1.4 m above the ground.
a space probe journeys at a constant velocity from earth to tau ceti a distance of 11.5 y in a time of 1.4 y as
a mass at rest on a frictional metal flat circular plate radius 2m slides when the angle to the horizontal is raised
Two hockey players strike a puck of mass 0.169 kg with their sticks simultaneously, exerting forces of 1.25 103 N, Find the instantaneous acceleration of the puck
A bullet of mass 7.7 g is fired into aninitially stationary block and comes to rest in the block. The block, of mass 1.21 kg, is subject to nohorizontal external forces during the collision with the bullet.After the collision, the block is observe..
An archer shoots a 2.0x10^-2 kg arrow at a target with a speed of 50 m/s. When it hits a target, it penetrates to a depth of 8.6x10^-2 m. What was the magnitude of the average force exerted by the target on the arrow?
A total of 2.99·106 electrons are placed on an initially uncharged wire of length 2.25 m. What is the magnitude of the acceleration of a proton placed at that point in space
The star Alpha goes supernova. Ten years later and 80 ly away, as measured by astronomers in the galaxy, star Beta explodes. what is the time between the explosions
A cycle receives 500 Btu of heat at 1000°F and rejects 200 Btu of heat at 200°F. There is work input of 275 Btu and work output of 575 Btu. Compute the cycle efficiency
in a x-ray tube electrons are accelerated through a potential of 10 000v. how much energy does the accelerated
A motorcycle and rider have a total mass equal to 300kg. Therider applies the brakes, causing the motorcycle to accerelate at arate of -5m/s2. What is the net force on the motorcycle
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