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A UFO streaks across the sky at a speed of 0.80 c relative to the earth. A man on earth calculates the length of the UFO to be 250 meter along the direction of its motion. Find what length does the man measure for the UFO when it lands?
m
A decade before Einstein published his theory of relativity, J.J. Thomson proposed that the electron might consist of small parts, Find the total electric potential energy of this arrangement
A ball is thrown vertically upward with a speed of 15.0 m/s. How long does it take to reach its highest point
What is the speed of an electron with a de Broglie wavelength of 0.140nm and 0.140nm
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 61.22 diopters, How far is the blackboard from her eyes
1 explain why an object too far from the motion detector will produce an incorrect distance reading?2 look up an
The angle of refraction of a ray of light traveling through a piece of fused glass quartz is 41°. Find the angle of incidence
"Calculate the gravitational potential energy at the surface of the sun. How much would the sun have to shrink each second in order to generate the Luminosity of the sun just by converting gravitational potential energy?" The hint my teacher gave ..
An astronaut who is repairing the outside of her spaceship accidently pushes away a 98.9-cm-long steel rod, which flies off at 10.5 m/s, never to be seen again. As it happens, the rod is oriented perpendicularly to the magnetic field in that region o..
Describe the interference of two wave pulses with different amplitudes if they are a) in phase and b) completely out of phase
A near-sighted person might correct his vision by wearing diverging lenses with focal length f = -45cm, Use ray tracing to determine the location of the image
During a test, a NATO surveillance radar system, operating at 12 GHz at 155 kW of power, The aircraft reflects radar waves as though it has a cross-sectional area of only 0.22 m2. What is the power of the aircraft's reflection
A coil has 400 turns and self-inductance 3.5 mH. The current in the coil varies with time according to i=(680mA)cos[(πt)/(0.025s)], Find the maximum average flux through each turn of the coil
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