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A 1250 kg elevator is descending at a constant speed of 2.50 m/s. How much work does the elevator's motor perform on the combined elevator/ man system in 10.0 seconds? Is this work positive or negative?
Two stunt men are going to jump out of a stationary balloon 457 meters off the ground, jumper A will jump first, pulling his parachute at 4 seconds after the jump. Jumper B will jump precisely 20 seconds after jumper A. Jumper B is slightly heavier t..
an industrial proposer claims that he can extract 50 kw power by drawing 3000 kj of hear per minute from a high
a closely wound rectangular coil of 90 turns has dimensions of 20.0cm by 44.0cm. the plane of coil is rotated from a
Find the electric field at the top point of a right circular solid cone of charge Q, uniform density. The cone has a radius a and a height h.
An astronaut who is repairing the outside of her spaceship accidently pushes away a 90.5-cm-long steel rod, What is the magnitude of the EMF, in millivolts, induced between the ends of the rod
Find the radius of an electron's orbit when it moves perpendicular to a magnetic field of 0.56 with a speed of 6.29×10^5 m/s
question1the rhinestones in costume jewellery are glass with index of refraction 1.50. to compose them more reflective
A loop antenna of area A = 1.87 cm2 and resistance R = 4.06 µO is perpendicular to a uniform magnetic field of magnitude 19.7 µT. How much thermal energy is produced in joules in the loop by the change in field
Someone puts an upright 0.450 m radius wreath made out of 30 windings of a string of lights, What is the induced current in the wreath from a N-S wire with a steady DC of 4.00 A2.00 m below the wreath
A 46.0-kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 20.0 m. What is the centripetal acceleration of the child
A 0.320 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? kg (b) What fraction of the original k..
Atmospheric scientists studying clouds in the Marshall Islands have observed what they believe to be the world's largest raindrops, with a radius of 0.52 cm. How many molecules are in these monster drops
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