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An astronaut is traveling to the Moon at a speed of 0.57c. When his spacecraft is1.9*10 8 m from the Moon, there is an explosion on the Moon. How long does it take for light from the explosion to reach the astronaut as gauged on the astronaut's clock?
The Electric potential at the center of a square is -2V when a charge of -q is located at one of the square's corner. What is the electric potential at the square's center when identical charges of +q are placed at the other three corner's of t..
A 0.430 kg block is attached to a horizontal spring that is at its equilibrium lenght, and whose force constant is 20.0 N/m. The block rest on a frictionless surface. A 0.0500 kg wad of putty is thrown horizontally at the block, hitting it with a ..
A football coach in hopes of improving his kicker's performance fills a .9 kg football with helium rather than air. what change in relative weight of the football (change in weight divided by weight) is to be expected
Two cylindrical glass beads each of mass m = 32 mg are set on their flat ends on a horizontal insulating surface separated by a distance d = 3 cm. The coefficient of static friction between the beads and the surface is μs = 0.3.
A block with a mass of 0.148 kg is traveling at 8.4 m/s on a horizontal, frictionless surface when it hits a spring with a spring constant of 722 N/m. What is the maximum amount the spring is compressed
A car weighing 8600 N moves along a level highway with a speed of 70 km/h. The power of the engine at this speed is 66 kW. what is the new speed of the car on the hill
A current in magnetic filed experience a force. Therefore it should be possible to pump conducting liquids by sending a current through the liquid, what advantage would such a pump have
A charged particle moves through a velocity selector at a constant speed in a straight line, Find the charge-to-mass ratio of the particle
A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. obtain the work done on the jet by the catapult
A car of mass 1500kg turns an incined corner (radius 50m, angle 30degrees), How fast can the corner be taken without losing traction
A string is stretched and fixed at both ends 426 cm apart. If the density of the string is 0.022 g/cm, and its tension is 441 N, what is the speed of the traveling waves
A car parked in the sun absorbs energy at a rate of 590 watts per square meter of surface area. The car reaches a temperature at which it radiates energy at this same rate. Treating the car as a perfect radiator (e = 1), discover the temperature.
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