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A gymnast is performing a floor routine. In a tumbling run shespins through the air, increasing her angular velocity from 3.00 to4.30 rev/s while rotating throughthree-fourths of a revolution. How much time does this maneuver take?
Each plate of a parallel-plate air-filled capacitor has an area of 0.0020 m2, What is the surface charge density on the plates
A gravitron ride at a fair consists of a large cylinder of radius15.0m, spinning about its vertical axis of symmetry. how many revolutions per minute must the cylinder execute
A slingshot fires a pebble from the top of a building at a speed of 14.0 m/s. The building is 28.0 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground
A pitcher is employing a ballistic pendulum to determine the speed of his fastball. A 3.3 kg lump of clay is suspended from a cord 2.0 m long, find the speed of the pitch
What is magnitude of the electric field
Chromium is produced by reacting with its oxide with aluminium. If 304 g of Cr2O3 and 108 g of Al completely react to form 204 g of Al2O3 how many grams of Cr are formed.
A circular loop of radius 0.10 m is rotating in a uniform external magnetic field of 0.20 T. Find the magnetic flux through the loop due to the external field
Without friction, and in the absence of external forces, the sum of the potential and kinetic energies of a body is constant. More power is required while slowly lifting a box than while lifting it up quickly. Energy is required to do work. Work cann..
A 40.0 kg wagon is towed up a hill inclined at 18.5o with respect to the horizontal. What is the acceleration of the wagon
In her bathroom, Mindy has an overhead heater that consists of a coiled wire made of nichrome that gets hot when turned on. The wire has a length of 2.2 m when it is uncoiled. What is the resistance of the heater when it is turned on
A person is riding a bicycle, and its wheels have an angular velocity of 11.5 rad/s. How much time does it take for the bike to come to rest
a transformer has 355 turns in the primary coil and 197 in the secondary coil.a. what kind of transformer is this?b. by
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