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A merry-go-round makes 27 revolutions in a 3.5min ride. What is its average angular speed in rad/s? What are the tangential speeds of two people 3.8m and 4.5m from the center, or axis of rotation?
In a machine shop,a hydraulic lift is used to raise heavy equipment forrepairs. What force must be applied to the small piston inorder to lift the engine in units of N
A copper wire of length 25 cm is in a magnetic field of 0.20 T. Ifit has a mass of 10 g, what is the minimum current through the wire that would cause a magneticforce equal to its weight?
You hit a 142 g baseball by swinging a bat with a force of 500 N. The collision lasts for 25.0 ms. If the ball was initially thrown at 19 m/s, What is the final speed of the ball
a ball player hits a home run and the baseball just clears a wall 18.8 m high located 117.0 m from home plate. the ball
A 7.45 nC charge is placed 1.88 meter from a 3.94 nC point charge. Estimate the magnitude of the electrostatic force that one charge exerts on the other
A ski starts from rest and slides down a 29° incline 100 mlong. Use energy methods. how far will the ski travel along the level
A coin placed on a turntable rotating at 36.3 rev/min will stay there if its center is placed no further than 10.0 cm from the axis of rotation. What is the maximum distance the center of the coin can be placed from the axis if the turntable rotates ..
Two identical 3.00-ohms wires are laid side by side and soldered together s they touch each other for half of their lengths. What is the equivalent resistance of this combination
1. suppose a room is divided into the front one fifth the middle two fifths and the back two fifths. what is the ratio
A zone plate is to be set up on an optical bench , where it will be used an an enlarging lens. find the focal length of the zone plate
Three large but thin charged sheets are parallel to each other. Sheet I has a total surface charge density of 7.6nC/m2, Estimate the magnitude of the force per unit area on sheet
In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. Find the magnitude of the total acceleration (centripetal plus tangential) ..
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