The magnetic force on a charged particle is always:
a. perpendicular to the particle's velocity.
b. in the direction of the particle's velocity.
c. absent for moving particles.
d. parallel to the particle's velocity.
e. in the opposite direction to the particle's velocity.
a
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John Bell is known as
A) the discoverer of the uncertainty principle. B) the first person to actually eat a pizza. C) the discoverer of the nonlocality principle. D) the originator of the "many worlds interpretation" of quantum theory. E) the originator of the most widely-accepted philosophical interpretation of quantum theory.
Elementary Particles: Which of the following particles (or groups of particles) are made up of quarks?
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Everyone receives background radiation. This comes from various sources; the ground, medical procedures, radon in the air, etc. On the average, people in the United States receive about
A. a mrem of radiation a day B. 300 mrems of radiation a day C. A rad of radiation a day