A 1.0 g particle has momentum 400,000 kgm/s. What is the particle’s speed in m/s?
The speed of particle is .
We have given that, a 1.0 g particle has momentum 400,000 kgm/s.
We will use relativistic momentum formula to get the value of photon's velocity.
Formula of relativistic momentum is :
Here, m = mass of photon
v = velocity of photon
c = speed of light
= relativistic density
Substituting the values in the formula :
Many science fiction spaceships are powered by antimatter reactors. Suppose a long spaceship, with a mass of
when empty, carries of fuel: each of matter and antimatter. The matter and antimatter are slowly combined, and the energy of their total annihilation is used to propel the ship. After consuming all the fuel and reaching top speed, the spaceship flies past a space station that is stationary with respect to the planet from which the ship was launched. What is the length of the spaceship as measured by astronauts on the space station?
The star Alpha goes supernova. Ten years later and away, as measured by astronomers in the galaxy, star Beta explodes.
a. Is it possible that the explosion of Alpha is in any way responsible for the explosion of Beta? Explain.
b. An alien spacecraft passing through the galaxy finds that the distance between the two explosions is. According to the aliens, what is the time between the explosions?
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