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A windmill has an initial angular momentum of 8270 kg · m2/s. The wind picks up, and 5.81 s later the windmill's angular momentum is 9310 kg · m2/s. What was the torque acting on the windmill, assuming it was constant during this time?
N · m
A 3.06 kg block slides down a frictionless plane inclined 18.6' to the horizontal. If length of the plane's surface is 1.43 m, how much work is done, and by what force.
The frequency of an oscillator making traveling waves is tripled. What happens to the velocity of the wave
A rod 50 cm long and 1.0 cm in radius carries a 2.0 microC charge distributed uniformly over its length. Find the approximate magnitude of the electric field
An isolated conductor of arbitrary shape has a net charge of +1.2 10-5 C. What is the charge on the cavity wall
A 50-kilogram woman balances on one heel of a pair of high heel shoes. If the heel is circular with radius of .5 cm, what pressure does she exert on the floor.
A thin double-convex lens is intended to focus the image of an object onto a screen so that the image is life-sized on the screen. find the total distance between the object and the image
compute the accelerations experienced by the blood.
A motorboat is pointed due south, and its motor gives the boat a constant speed of 5.00 m/s through still water. Find the magnitude and direction of the boat's total velocity
When two sticks are laid end-to-end they cover a length of 8.32 feet. One stick is 2.90 ft longer than the other. What is the length of the shorter stick in feet.
A star is moving away from the Earth at the speed of 200 km/s. What will be the wavelength of a spectral line that would have the wavelength of 500 nm if the star were at rest.
Suppose that you are traveling on board a spacecraft that is moving with respect to the earth at a speed of 0.954c. what is your breathing rate
Consider a charge of +1 nC (nanocoulombs, or Coulombs ×10?9) at (-3, -4) m, and a charge of -2 nC at (12, -5). Calculate the electric field strength at the origin
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