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A cosmic-ray proton is moving at such a speed that it can travel from the Moon to Earth in 1.5s.
a) At what fraction of the speed of light is the proton moving?
b) What is it's kinetic energy?
c) What value would be measured for its mass by an observer in Earth's reference frame?
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1230 Hz. The bird-watcher, however, hears a frequency of 1260 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
To pump 100Joules of heat from the ice cube tray of freezing water at 273K, out into a hot room at 310 K, the laws of thermodynamics say that you will need at least how many Joules of ordered energy or work.
A small drop of water measuring 0.6 mm in diameter, how many extra electrons are on the drop of water
A laser pulse has a duration of 4.00× 10?11 s and a frequency of 6.40× 1014 Hz. How many cycles of wave are in the pulse
A parallel-plate capacitor is to be constructed by using, as a dielectric, rubber with a dielectric constant of 3.20, What is the minimum area the capacitor plates can have
You need to prepare a 0.187mm-diameter tungsten wire with a resistance of 3.43 ohm. How long must the wire be
A stone is dropped at t = 0. A second stone, with 6 times the mass of the first, is dropped from the same point at t = 56 ms. How fast is the center of mass of the two-stone system
An electron is observed traveling at a speed of 25.7·106 m/s, How far will the electron travel before coming to a stop
The internal energy of a system changes becasue the system gains 176 J of heat and performs 312 J of work. During this return process, what work is involved
Two turning forks oscillating coherently and in phase at 1200Hz are separated by 0.35m, Calculate the angles of minimum intensity
The weight of the block on the table is 484 N and that of the hanging block is 165 N. Ignore all frictional effects, and assuming the pulley to be massless. Find the acceleration of the two blocks
As expected, the predictions of Coulomb's law are well confirmed. You find that the forces are: repulsive? or attractive? 2. and that the magnitude of each force is?
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