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An alpha particle is a helium nucleus with a mass of 6.68×10−27 kg. Suppose an alpha...

An alpha particle is a helium nucleus with a mass of 6.68×10−27 kg. Suppose an alpha particle moves with a speed of 0.653c.

a. Find the magnitude of its momentum.

b. What is the total energy of the particle?

c. What is its rest energy?

d. What is its relativistic kinetic energy?

2. Laboratory experimenters measure the lifetime of a neutron at rest to be 1.80 s. They then measure its lifetime to be 5.13 s when it was moving. How fast was it moving?

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