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Question: A 43-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 230 J from 420 J. How high does she rise during this interval? Neglect air resistance.
Infrared photons cause a particular piece of metal to emit photoelectrons. Would photoelectrons be emitted when the metal is illuminated by visible light?
nuclear-pumped x-ray lasers are seen as a possible weapon to destroy icbm booster rockets at ranges up to 2000 km. one
A solid aluminum cylinder with density equal to 2700 kg/m3 has the weight equal to 0.66 N in air and the apparent weight of 0.22 N when immersed in an unknown liquid. What is the density of this liquid
A skier approaches the base of an icy, frictionless hill with a speed of 10.7 . The hill slopes upward at 19.0 above the horizontal. Find the acceleration of this skier
A 2680 satellite used in a cellular telephone network is in a circular orbit at a height of 800 above the surface of the earth. What fraction is this force of the satellite's weight at the surface of the earth
A 65-kg woman cheats on her diet and eats a 612-Calorie (612 kcal) jelly doughnut for breakfast. If the human body is only 21% efficient in converting chemical energy to mechanical energy, how many stairs must the woman climb to work off her breakf..
A m1 = 14.50 kg object and a m2 = 10.00 kg object are suspended, joined by a cord that passes over a pulley with a radius of 10.00 cm and a mass of 3kg.
The velocity selector in the figure is designed to allow charged particles with a speed of 4700 m/s to pass through undeflected. Find the magnitude of the required electric field
A rocket is launched at an angle of 59° above the horizontal with an initial speed of 97 m/s. The rocket moves for 3s along its initial line of motion with an acceleration of 28m/s2.
two equal positive charges of magnitudenbspq1nbspnbspq2nbsp 2 nc are on thenbspynbspaxis atnbspy1nbsp 3 cm
A rail car that weighs 44 N is accelerated at 6.4 m/s/s for 2.9 seconds. How much work is done on the rail car
An electron is moving in the +y direction at 4.7 x 105 m/s when it encounters a magnetic field of 2.5 T coming out of the page. What is the magnetic Force (FB) acting on the electron
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