Learning Goal: To learn to calculate energy and momentum for relativistic particles and, from the relativistic equations, to find relations between a particle's energy and its momentum through its mass.
Part A | |||||||||
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Find the momentum Express your answer in
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Part B | |||||||||
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Find the total energy Express your answer in millions of electron volts to three significant figures.
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Part C | |||||||||||||||||||
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What is the value of the expression Express your answer in millions of electron volts squared to three significant figures.
The answer to this part is numerically equal to the rest mass of the proton squared. In fact, this result points to a very important equation in relativistic physics:
Express your answer in
Thus, if a particle moves at the speed of light, it must have no rest mass. Usually this fact is stated somewhat differently: Massless particles always move at the speed of light. Can you think of an example of such particles? |
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