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Two steel juggling balls each carry a charge of2.75 μC. There is a repulsive force between themof 1.85 N. What is the distance between the centers of the two balls?
A 1.0mL syringe has an inner diameter of 6.0mm , a needle inner diameter of 0.29 mm , and a plunger pad diameter (where you place your finger) of 1.2 cm . A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100mmHg...
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a 6 iron. For how much more time was the ball in flight
A sledge with bricks has a total mass of 180.0 kg and is pulled at a constant speed by a rope inclined at 20 degrees above the horizontal. The sledge moves a distance of 20 m on a horizontal surface.
Plane waves of wavelength 455 nm are incident on a single slit of width .24 mm. A viewing screen is 6.0 meter away, what will the spacing (in meters) between the two first order minima
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angle of 27.0° above the horizontal. What is the magnitude of the net torque exerted on the branch by the children
The membrane of the axon of a nerve cell is a thin cylindrical shell of radius r = 10-5 m, length L = 0.42 m, and thickness d = 10-8 m. Find the electric field through the membrane
A playground is on the flat roof of a city school, 5.3 m above the street below, Find the vertical distance by which the ball clears the wall
A ball of mass 0.640 kg moving east (+x direction) with a speed of 3.50 m/s collides head-on with a 0.84 kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision?
A 62 kg skier coasts up a snow-covered hill that makes an angle of 25° with the horizontal. What is the magnitude of the kinetic frictional force
Two Styrofoam balls with the same mass m = 9.5 10-8 kg and the same positive charge Q are suspended from the same point by insulating threads of length L = 0.98 m (the figure below). The separation of the balls is d = 0.026 m. What is the charge Q?
A solid, horizontal cylinder of mass 7.1 kg and radius 0.57 m rotates with an angular speed of 5.84 rad/s about a fixed vertical axis through its center. What is the final angular speed of the system
A proton is accelerated from rest through 500. V. It enters a magnetic field of 0.300 T oriented perpendicular to its direction of motion. determine the frequency with which it moves around this path
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