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A rotating door is made from four rectangular glass panes, as shown in the drawing. The mass of each pane is 79 kg. A person pushes on the outer edge of one pane with a force of F = 75 N that is directed perpendicular to the pane. Determine the magnitude of the door's angular acceleration.
______rad/s2
What is the maximum speed the car can have at point B for the gravitational force to hold it on the track.
A "diving bell" is a tube or pipe that is closed at the top and open at the bottom. It is lowered into a body of water with the open end down so that air is trapped inside, Find the absolute pressure of the air in the bell
Ultraviolet light with a wavelength of 35nm shines on a gas of hydrogen atoms in their ground states. Some of the atoms are ionised by the light. What is the kinetic energy of the freed electrons in this process
A football punter accelerates a football from rest to a speed of 11 m/s during the time in which his toe is in contact with the ball (about 0.24 s). what average force does the punter exert on the ball
A sinusoidal voltage ?v = (75 V) sin (160t) is applied to a series RLC circuit with L = 10 mH, C = 145 ?F, and R = 44 ?. What is the maximum current in the circuit
After solving a difficult physics problem, an excited student throws his book straight up. It leaves his hand at 3.7 m/s from 1.5 m above the ground. How much time does it take until the book hits the floor?
First discuss how energy can be converted from one form to another, giving specific examples. Define what we mean
Consider a single electron, with a mass of 9.1×10?31kg , subject to a single force equal to the weight of a penny, 2.5×10?2N
discuss general considerations of various electromagnetic radiations at many wavelengths to study diverse astronomical
A block of wood is compressed 2.4nm when inward forces of magnitude 128N are applied to it on two opposite sides. what is the effective spring constant of the block
A 62- kg gymnast stretches a vertical spring by 0.52 m when she hangs from it. How much energy is stored in the spring
When a mass of 25 g is attached to a certain spring, it makes 19 complete vibrations in 4.5 s. What is the spring constant of the spring
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