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The electric potential at a position located a distance of 21.3 mm from a positive point charge of 7.90×10-9C and 14.8 mm from a second point charge is 1.18 kV. Compute the value of the second charge.
A pendulum consists of a mass m suspended by a massless springwith unextended length b and spring constant k. What is the period of small oscillations
Two small metallic spheres, each of mass 0.20g, are suspended as pendulums by light strings from a common point.
A boy in a wheelchair (total mass 51.0 kg) has speed 1.40 m/s at the crest of a slope 2.40 m high and 12.4 m long. Find the work he did in pushing forward on his wheels during the downhill ride
Using Lorentz Law: You are given a charge moving between two parallel plates. Find the current (I) of a loop given a straight wire
A monochromatic point source of light emits 5.5 W of electromagnetic power uniformly in all directions. Find the (magnitude of the) Poynting vector at a point situated at each of the following locations:
a horizontal wire is hung from the ceiling of a room by two massless strings. the wire has a length of 0.23 m and a
The 2.0 kg, 20 cm diameter disk is spinning at 320 rpm. How much friction force must the brake apply to the rim to bring the disk to a halt in 2.0 s.
once upon a time a stunt man named evil knievel boasted that he would jump across the grand canyon on a motorcycle.
The stairs are 83 long and inclined at the angle of 31. If a player has a mass of 87, estimate his average power output on the way up. Overlook friction and air resistance.
a 1.53-cm-high object is placed 20.0 cm in front of a concave mirror with a 4.26-cm focal length. what is the position
A device known as Atwood\'s machine consists of two masses hanging from the ends of a vertical rope that passes over a pulley. Assume the rope and pulley are massless and there is no friction in the pulley.
A point charge with charge is held stationary at the origin. How much work is done by the electrostatic force on the moving point charge
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