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Q: A spaceship travels at a speed of 0.90c to a star that is 9.0 ly away.
1) According to a person on Earth, how long does the trip take?
2) According to a scientist ON the spaceship, how long does the trip take?
3) According to the scientist ON the spacehip, what is the distance travelled during the trip?
4) At what speed do observers on the spaceship see the star approaching them.
Two charges are separated by a distance d and exert mutual attractive forces F on each other. If the charges are separated by a distance of d/3, what are the new mutual forces? q1 = +2C and q2 = -2C
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An experimenter bombards a target of 54Cr with alpha particles such as 4He + 54Cr -> p+ 57Mn Suppose the incoming alpha particle has 26MeV kinetic energy in the lab, What is the kinetic energy of the detected proton
You need to make an ac generator with a sinusoidal output of 14.0 V amplitude and frequency 50 Hz. At what angular frequency should the coil be rotated
A car is traveling at 41.0 km/h on a flat highway. If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop
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