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A pendulum bob of mass 0.5 kilogram swings on the end of a 0.80 meter string, making an angle of 25 degree with the vertical at its highest point. Find the kinetic energy and speed of the bob when it passes through the equilibrium position?
A proton accelerates from rest in a uniform electric field of 630 N/C. At some later time, its speed is 1.04 106 m/s. Find the magnitude of the acceleration of the proton
water flows at a rate of 25 lmin through a horizontal 7.0-centimeter-diameter pipe under a pressure of 6.0 pa. at one
A 10 kg weight is put on the weightless piston of the cylinder (20 cm in diameter) filled with oxygen gas (P=101.3kPa, V=1m^3). Calculate the volume of the compressed gas
A block of wood is held in place against a rough wall by someone pushing on it with a force directed upward at 28 degrees above the horizontal, What is the mass of the block of wood
A sled with mass 8.00 kilogram moves in a straight line on a frictionless horizontal surface. Use the work-energy theorem to determine the force acting on the sled
a hollow cylindrical conductor has an inner radius a 1.1 cm and an outer radius b 3.7 cm. the total current through
The ground-state wavefuntion of a hydrogen atom is Y=(1/((pi)a^3))^(1/2)*e^(-r/a) where a=bohr radius. a) calculate probability that the electron will be found within a small sphere of radius 1pm on the nucleus. b) no what if the sphere is at r=a. Wh..
A skier of mass 71 kg is pulled up a slopeby a motor-driven cable. What power must a motor have to perform this task
You walk for 6.44 km with at a constant velocity of 2.60 m/s due west, turn around, and then walk with an average velocity of 0.405 m/s due east, During the trip, how far east did you walk
A -6.00 µC charge is moving with a speed of 7.80*104 m/s parallel to a very long, straightwire. The wire is 5.00 cm from the charge and carries a current of78.0 A in a direction opposite to thatof the moving charge. Find the magnitude and directio..
Your car engine slows down from 3700 rpmto 1600 rpm in 4.0 s. Calculate the total number of revolutions the engine makes inthis time
While waiting for your plane to take off, you suspend your keys from a thread and set the resulting pendulum oscillating. It completes precisely 88 cycles in 1 minute. You repeat the experiment as the plane accelerates down the runway, and now find t..
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