Which is smallest, an atom, a nucleus, a proton, or an electron?
a. atom
b. electron
c. nucleus
d. proton
b
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To have a negative ion, you must have:
A) taken away a proton from the nucleus. B) added a positron to the nucleus. C) added a positron to the outer electron shell. D) added an electron to the outer electron shell. E) None of these; only positive ions can exist in nature.
A 90.0 N crate of apples sits at rest on a ramp that runs from the ground to the bed of a truck. The ramp is inclined at 20 
to the ground. What is the force exerted on the crate by the ramp?
A. 86.9 N B. 84.6 N C. 75.8 N D. 30.8 N E. 38.5 N
An unknown tuning fork is sounded along with a tuning fork whose frequency is 256. Hz and a beat frequency of 3. Hz is heard. What is the frequency of the unknown tuning fork?
A) It must be 256 Hz. B) It must be 259 Hz. C) It could be either 253 Hz or 259 Hz; there is no way to tell. D) It must be 253 Hz.
A golf ball hits a wall and bounces back at 3/4 the original speed. What part of the original kinetic energy of the ball did it lose in the collision?
a. 1/4 b. 3/8 c. 7/16 d. 9/16 e. 3/4