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A proton is released from rest at the origin in a uniform electric field in the positive x direction with a magnitude 850 N/C. What is the change in the electric potential energy of the proton-field system when the proton travels to x = 2.5 m?
2150 kg satellite is in a circular orbit 780 km (780 x 103 m) above the surface of the earth. What is the speed of the satellite in its orbit
A jet is circling an airport control tower at a distance of 16km. An observer in the tower watches the jet cross in front of the moon. As seen from the tower, the moon subtends an angle of 9.50x10-3 radians. Find out the distance traveled (in mete..
a 4 microf capacitor is charged by a 200 v supply. it is then disconnected from the supply and is connected to another
A kaon is moving in the +x direction decays by this process, where that pi^+ is moving off at a speed of 0.9c in the +x-direction, determine the speed of the kaon before the decay
A metal sphere of radius 10 cm carries a charge of +2.0 uC. What is the magnitude of the electric field 5.0 cm from the spheres surface?
The current in a refrigerator with a resistance of 8.5 ohm is 18.5 Amp (when the refrigerator is on). Calculate the power delivered to the refrigerator
A particular eye has a focal length of 2.0 cm instead of the 2.2 cm that would put a sharply focused image on the retina. Is this eye nearsighted or farsighted? What type of corrective lens is needed for the eye in the previous question?
A 500-turn circular coil with an area of 0.050 m2 is mounted on a rotating frame, What is the instantaneous emf in the coil at the moment that the normal to its plane is parallel to the field
A 4.0-kg rock is dropped from a height of 21.0 m. At what height is the rock's kinetic energy twice its potential energy? ?? m A cylinder of gas is at room temperature (20°C). The air conditioner breaks down, and the temperature rises to 49°C. Wha..
A pair of power transmission lines each have a 0.86ohms resistance and carry 940A over 13km. If the rms input voltage is 24kV. Calculate the voltage at the other end
You illuminate a slit of width 0.0643 mm with light of wavelength 711 nm, What is the width, in centimeters, of the pattern\'s central maximum
A weight (with a mass of 90 kg) is suspended from the point near the right-hand end of a uniform boom with a mass of 71kg. To support the uniform boom a cable runs from this same point to a wall (the left-hand vertical coordinate) and by a pivot on t..
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