Question

*Proton speed

The rest energy of a proton is about 938 MeV. If its kinetic energy is 1071 MeV, find the proton's speed as a ratio of c to 3 significant figures.

Answer #1

A proton moves with a speed of 0.975c.
(a) Calculate its rest energy. MeV
(b) Calculate its total energy. GeV
(c) Calculate its kinetic energy. GeV

What is the momentum of a proton with 950-MeV total energy?
(Rest energy of a proton is 938 MeV)

An electron has a kinetic energy K of 1 MeV and is incident on a
proton at rest in the laboratory. Calculate the speed of the CMS
frame (The centre of mass, or centre of momentum, (CMS) frame is
that in which the sum of the momenta (i.e., the total momentum) of
all particles is zero) moving relative to the laboratory.
(a) Express the initial energies Ee, Ep and initial momenta pe,
pp of the electron and proton respectively (with...

Consider an anti-proton (rest mass = 1.007 825 amu) whose
kinetic energy is 450 MeV.
• Compute the ratio v/c (particle speed divided by speed of
light) using both the classical expression and the relativistic
expression for kinetic energy? How much error (in %) is incurred by
using the classical expression?
• Compute the magnitude of the anti-proton’s momentum using both
the relativistic and classical formulas. Provide you answers in
units of MeV/c.

1. What is the momentum (p) of a 960-MeV proton (that is, its
kinetic energy is 960 MeVMeV )? Express your answer with the
appropriate units.
2. An electron (mmm = 9.11×10−31 kg ) is accelerated from rest
to speed v by a conservative force. In this process, its potential
energy decreases by 6.70×10−14 J . Determine the electron's speed,
v. (in term of c.)

What is the momentum of a 870-MeV proton (that is, its kinetic
energy is 870 MeV )?

In a proton linear accelerator, protons are accelerated to have
a kinetic energy of 600 MeV. What is the speed of these protons?
(The rest mass of proton is 1.67x10^-27 kg.)

The total energy of a proton is three times its rest energy.
Find the momentum of the proton in MeV/c units.

A proton moves with a speed of 0.850c.
(a) Calculate its rest energy.
____________________MeV
(b) Calculate its total energy.
___________________ GeV
(c) Calculate its kinetic energy.
____________________ GeV

An object has a total energy that is 2.8 times its rest
energy.
Part A
Part complete
What is its speed?
Express your answer using two significant figures.
v =
0.93
c
SubmitPrevious Answers
Correct
Part B
What is the ratio of the object’s relativistic kinetic energy to
its rest energy?
Express your answer using two significant figures.

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