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Astronaut Spud Nick is space-travelling from planet X to planet Y at a speed of 0.59 c. When he is precisely halfway between the planets, a distance of 1 light-hour from each in the planets' frame, nuclear devices are detonated. The explosions are simultaneous in the frame of the planets. Find the difference in time of arrival of the flashes from the explosions as observed by Spud?
A 7.5m long extension cord carries a current of 12 amps. The cord is made of two wires, carrying currents in opposite directions, separated by a distance of 4.9mm
You drop a stone into a deep well and hear it hit the bottom 1.80 s later. This is the time it takes for the stone to fall to the bottom of the well, plus the time it takes for the sound of the stone hitting the bottom to reach you. Sound travels ..
The sound level measured in the room by a person watching a movie in a home theatre system varies from 63 dB throughout a quiet part to 92 dB throughout a loud part. In the order of how many times louder is the latter sound.
A 2,200-kg pile driver is used to drive a steel I-beam into the ground. calculate the average force the beam exerts on the pile driver
A merry-go-round with, radius 3 m rotates freely with an angular speed of 2/pi rev/s. Its kinetic energy is 4000 J. What is the final angular speed of the merry-go-round and the person after the person jumps on
If the first-order maxima are separated by1.48 meter on the screen, find the distance between the two second order maxima
What is the mean free path for the molecules in an ideal gas when the pressure is 100 kPa and the temperature is 300 K given that the collision cross-section for the molecules of that gas is 2.0 × 10-20 m2? Boltzmann's constant is k = 1.38 × 10-23..
In the figure, two particles, each with mass m = 0.79 kg,are fastened to each other, and to a rotation axis at O,by two thin rods, each with length d = 6.0 cm and massM = 1.2 kg. The combination rotates around the rotationaxis with angular speed ω = ..
Nichrome wire of cross-sectional radius 0.758 mm is to be used in winding a heating coil. find the length of wire you must use to wind the coil
Where an object should be placed in order to have magnification of 2.00 in each of the following cases? A converging lens with a focal length of 10.0cm
a satellite is describing a circular orbit about the earth with speed v. the satellite is separated into two pieces by
a length of metal wire has a radius of 5. x 10-3 m and a resistance of 0.1. when the potential difference across the
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