How big is the nucleus of an atom?
a. about 1% of the volume of the whole atom
b. about a millionth of the volume of the whole atom
c. about a billionth of the volume of the whole atom
d. about a trillionth of the volume of the whole atom
D
You might also like to view...
The term observable universe refers to
A) that portion of the universe that we have so far photographed through telescopes. B) the portion of the universe that can be seen by the naked eye. C) the portion of the universe that is not hidden from view by, for example, being below the horizon. D) that portion of the universe that we can see in principle, given the current age of the universe.
Areas always have dimensions ____ while volumes always have dimensions ____
a. m2, m3 b. L2, L3 c. Both a and b are correct. d. No answer is correct because of the "always."
A nuclear reaction is said to be exothermic if the total kinetic energy is
A) less after the reaction than before. B) equal both before and after the reaction. C) greater after the reaction than before. D) zero after the reaction.
Coal beds are formed from the accumulation of plant material that becomes trapped in swamp floors. Yet coal deposits are present in the continent of Antarctica, where no swamps or vegetation exists. How can this be?
What will be an ideal response?