Question

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.)

Answer #1

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...

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.)

An electron (mass m1 = 9.11 x 10-31 kg) and a proton (mass m2 =
1.67 x10-27 kg) attract each other via an electrical force. Suppose
that an electron and a proton are released from rest with an
initial separation d = 3.50 x 10-6 m. When their separation has
decreased to 1.40 x 10-6 m, what is the ratio of (a) the electron's
linear momentum magnitude to the proton's linear momentum
magnitude, (b) the electron's speed to the proton's...

*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.

What is the Kinetic Energy of an electron traveling at 0.8c. Its
rest mass energy is 0.511 Mev. (b) What is the total energy? (c)
What is the momentum ? Mass = 9.11 x 10^-31

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

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.

A proton has a total energy of E = 3.5 GeV. Determine the
following physical quantities: a) speed... v (in terms of c) b)
momentum... p ( in units... kg m/s & MeV/c ) c) kinetic
energy... K ( in units... J & MeV ).

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

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