The number of protons in a nucleus equals the number of neutrons
a. True
b. False
Indicate whether the statement is true or false
False
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Nearly all the elements found in nature were formed inside stars, EXCEPT for
A) carbon and silicon. B) hydrogen and helium. C) helium and carbon. D) silver and technetium. E) uranium and radium.
What is Eris?
A) a moon of Pluto B) an extrasolar planet ejected by another solar system and captured by ours C) an icy object that orbits in the Kuiper belt and is larger than Pluto D) the largest known asteroid
Consider two cylinders of gas identical in all respects except that one contains O2 and the other He. Both hold the same volume of gas at STP and are closed by a movable piston at one end
Both gases are now compressed adiabatically to one-third their original volume. Which gas will show the greater temperature increase? A) the O2 B) the He C) Neither; both will show the same increase. D) It's impossible to tell from the information given.
Steel wool wetted with vinegar is sealed within a balloon inflated with air. After several hours, what happens to the volume of the balloon?
A) The balloon inflates. B) The balloon deflates. C) The balloon dissolves. D) Nothing because the vinegar is acting on the steel wool, not upon the balloon.