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Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun, but a much smaller diameter. If you weigh 670 N on the earth, what would you weigh on the surface of a neutron star that has the same mass as our sun and a diameter of 20.0 km?
A strip of doped silicon 315 µm wide contains 9.0 1022 conduction electrons per cubic meter and an insignificant number of holes. What is the thickness of the strip
A copper rod has a length of 1.6 m and a cross-sectional area of 3.9 10-4 m2. What is the mass of ice per second that melts
A proton is fired directly into a uniform electric field that is able to bring the charge momen- tarily to rest. How much work does the electric field do in stopping the proton
An automible tire is rotated to last for 50,000 miles. Estimate the number of revolutions the tire will make in its lifetime
Suppose you see two main-sequence stars of the same spectral type. Star 1 is dimmer in apparent brightness than Star 2 by a factor of 100. What can you conclude? (Overlook any effects that might be caused by interstellar dust and gas.)
A man seeking to set a world record wants to tow a 104000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. find the greatest acceleration the man can give the airplane
An electron experiences a magnetic force of magnitude 4.20 10-15 N when moving at an angle of 45.0° with respect to a magnetic field of magnitude 3.90 10-3 T. Find the speed of the electron
What is the largest slit width for which there are no minima when the wavelength of the incident light on the single slit is436nm?
A 45 dB sound wave strikes an eardrum whose area is 4.1 × 10-5 m2. How much energy is received by the eardrum per second
A Major League fastball is thrown at 92.9 mph and with a spin rate of 108 rpm. how many full turns does the ball make between release and catch
A luminous object is 4.00m for a wall. You are to use a concave mirror to project an image of the object on the wall with the image 2.25 times the size of the object, how far should the mirror be from the wall
A rotating merry-go-round accelerates uniformly from rest to make one complete revolution in 2s. what is the magnitude of her total acceleration at t = 3s
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