A proton with initial kinetic energy E is moving in circular motion in a uniform magnetic field. When it has completed one fourth of a revolution, what is its kinetic energy?
a. 1.4 E
c. E
b. 0.71 E
d. The value is not given.
C
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A spaceship whizzes past a planet at high speed. An observer on the planet sees a contracted spaceship, while an observer on the spaceship sees
A) a contracted planet. B) an expanded planet. C) a normal planet. D) a contracted or expanded planet depending on the direction of travel.
Hubble's Law is only effective in measuring the distance to nearby galaxies
a. True b. False Indicate whether the statement is true or false
Nuclear Binding Energy: The neutral 
Al atom has a mass of 26.981539 u; a neutral hydrogen atom has a mass of 1.007825 u; a neutron has a mass of 1.008665 u; and a proton has a mass of 1.007277 u. What is the binding energy per nucleon for 
Al? (1 u = 931.5 MeV/c2)
A. 8.3 MeV B. 6.7 MeV C. 5.4 MeV D. 3.4 MeV E. 2.8 MeV
Which of the following statements about eclipses is true?
A. A partial solar eclipse happens every month, but not the total solar eclipse. B. A total solar eclipse is visible from any location on the day-side of Earth. C. A lunar eclipse is visible from any location on the night-side of Earth. D. All of these choices are correct.