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By turning a crank, you can do mechanical work at the steady rate of 0.15 horsepower. If the crank is connected to paddles churning 4 liters of water, find how long must you churn the water to raise its temperature by 5°C?
An electron is accelerated inside a parallel plate capacitor. The electron leaves the negative plate with a negligible initial velocity, What is the final velocity of the electron if you use relativistic mechanics
Long-playing vinyl records, still used by club DJs, are 12 inches in diameter and are played at 33 1/3 revolutions per minute. What is the speed (in m/s) of a point on the edge on such a record
Compare the motion of two objects before a collision with their motion after the collision. You should be able to find a quantity, which will remain unchanged in a collision. Be sure to justify your reasoning.
Determine how much work must you do to push a 14 kilogram block of steel across a steel table at a steady speed of 1.1 m/s for 2.7 second? Find what is your power output while doing so
three object of equal mass are located at three corners of asquare of edge length L find the gravitational field at the fourth corners due to the object
A rectangular corral of widths Lx = L and Ly = 2.16L contains seven electrons. What multiple of h2/8mL2 gives the energy of the ground state of this system? Assume that the electrons do not interact with one another, and do not neglect spin.
A 1500 kilogram van starts from rest and drives around a flat 50 meter diameter circular track, Find the direction and magnitude of the van's acceleration at t=10sec
A 16.23-cm-long, 173 g rod is pivoted at one end. A 16 g ball of clay is stuck on the other end. What is the period if the rod and clay swing as a pendulum
A rifle is aimed horizontally at a target 55.0 m away. Thebullet hits the target 2.90 cmbelow the aim point. What was the bullet's flight time
A submarine is 307 mhorizontally out from the shore and 127 m beneath the surface of the water. find the height of the building
A gardener mows a lawn with an old fashioned push mower. The handle of the mower creates an angle of 39o with the surface of the lawn. find the normal force exerted by the lawn on the mower
A 0.0425 kg bullet traveling horizontally with a velocity of magnitude 415 m/s is fired into a wooden block with mass 1.12 kg, initially at rest on a level surface with a coefficient of friction μ=.27.
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