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You are traveling in a spaceship at a speed of0.94c away from Earth. You send a laser beam toward Earth traveling at velocity c relative to you. What do observers on the Earth measure for the speed of the laser beam?
Two identical gliders on an air track are held together by a piece of string, compressing a spring between the gliders. What velocity does the other glider have
A person with mass mp = 77 kg stands on a spinning platform disk with a radius of R = 2.16 m and mass md = 185 kg. The disk is initially spinning at ? = 1.6 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.72 m f..
Compute coefficient of kinetic friction
an greenhoopwith mass mh 2.7 kg and radius rh 0.14 m hangs from a string that goes over a blue soliddiskpulley with
The drawing shows two boxes resting on frictionless ramps. One boxis relatively light and sits on a steep ramp. The other box isheavier and rests on a ramp that is less steep.
The filament of a light bulb has a temperature of 3.48 x 103 °C and radiates 60.0 W of power. The emissivity of the filament is 0.253. Find the surface area of the filament
Light containing two dissimilar wavelengths passes during a diffraction grating with 1000 slits/cm. On a screen 17.0 cm from the grating, the third-order maximum of the shorter wavelength falls midway among the central maximum and the first side maxi..
Sarah throws a ball too hard so it is over Julie's head when it reaches Julie's horizontal position, What is the speed of the ball when it leaves Sarah's hand
A tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 58.0 m/s, What work does the racket do on the ball
a 71 kg baseball lplayer jumps straight up to catch a line drive. If the 140 g ball is moving horizontally at 28 m/s and the catch is made when the ball player is at the highest point of his leap what is his speed immediately after stopping the ba..
A copper wire is stretched uniformly (maintaining constantdensity and resistivity) so that it is ten times its originallength (but of the same volume). by what factor is its resistance changed
A 7.80-g bullet moving at 500 m/s penetrates a tree trunk to a depth of 5.40 cm. find the average frictional force that stops the bullet
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