Absolute zero is
a. 0 K. b. – 459.67°F.
c. – 273.15°C. d. 0 on any temperature scale.
a, b, c
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General Questions: You pull on a crate with a rope. If the crate moves, the rope's pull on the crate must have been larger than the crate's pull on the rope, but if the crate does not move, both of these pulls must have been equal.
A. True B. False
What are the three layers of the Sun's atmosphere, in order of increasing distance from the surface?
a. Corona, chromosphere, photosphere b. Photosphere, corona, chromosphere c. Photosphere, chromosphere, corona d. Chromosphere, photosphere, corona
Atomic Nucleus: The symbol for a certain isotope of radium is 
Ra. How many nucleons are there in the nucleus of this isotope?
A. 88 B. 138 C. 214 D. 226 E. 314
A heavy boy and a lightweight girl are balanced on a massless seesaw
If they both move forward so that they are one-half their original distance from the pivot point, what will happen to the seesaw? Assume that both people are small enough compared to the length of the seesaw to be thought of as point masses. A) It is impossible to say without knowing the masses. B) It is impossible to say without knowing the distances. C) The side the boy is sitting on will tilt downward. D) Nothing will happen; the seesaw will still be balanced. E) The side the girl is sitting on will tilt downward.