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A proton is to orbit the Earth at the equator using the Earth's magnetic field to supply part of the necessary centripetal force.Should the proton move eastward or westward relative to a fixed point on the surface of the Earth?
Find the distance from the mirror to the point where the reflected rays meet.
Four charges are arranged on the corners of a square as shown. A fifth charge is located in the middle of the square. What is the net force on that charge?
A metal sphere is suspended by a silk thread and charged positively. If in carrying a positive charge of 5.0E-8 C, what is the potential difference between the ground and the sphere
a) What power contact lens should an optometrist prescribe to move the myopic far point out to infinity. b) with this correction, can Brian also read a book held at the normal near point, 25 cm from his eye.
A long, thin rod (length = 5.0 m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +6.0C point charge is fixed to one end of the rod, and a -6.0C point charge is fixed to the other end. find the magnitude of the net torque app..
What is magnitude of the speed of the boat relative to a stationary shore observer. A person stands at a point that is 4 m from one of the speakers and 4.4 m from the other. Does the person hear the tone? Explain.
A uniform pole is propped between the floor and the ceiling of a room. The height of the room is 8.00 ft, and the coefficient of static friction between the pole and the ceiling is 0.569. What is the length of the longest pole
A 60.0 gram golf ball is dropped from a height of 2.00 meters. how much energy did the ball lose
A 47-kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion. Find the force (magnitude and direction) exerted on her by the bungee cord
A 425 kg bear grasping a vertical tree slides down at constant velocity. What is friction force that acts on the bear.
An ideal gas is allowed to expand adiabatically until its volume increases by 50%. By approximately what factor is the pressure reduced
A 5p-mm-focal-length lens has f-stops ranging from f/1.4 to f/22. What is the corresponding range of lens diaphragm diameters
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