What is the kinetic energy of a particle of mass m that has a total energy four times its rest energy?
A. 5 mc2
B. 4 mc2
C. 3 mc2
D. 2 mc2
E. 1 mc2
C. 3 mc2
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What will be an ideal response?
A ball falls from a height h from a tower. Which of the following statements is true?
(A) The potential energy of the ball is conserved as it falls. (B) The kinetic energy of the ball is conserved as it falls. (C) The difference between the potential energy and kinetic energy is a constant as the ball falls. (D) The sum of the kinetic and potential energies of the ball is a constant. (E) The velocity of the ball is constant as the ball falls.
What is the speed of a proton in a cyclotron having a 0.50 T magnetic field when the proton is at a distance of 25 cm from the center?
a. 
b. 
c. 
d. 
e. 
How might dark matter particles be discovered?
A) by probing the interactions they have with the human body. B) through looking with X-ray telescopes at the X-ray's they emit. C) by measuring the radiation that comes from Type Ia supernovae. D) through looking with infrared telescopes at the IR radiation they emit. E) through experiments like the Large Hadron Collider.