A bone is dug up and analyzed and found to contain 1/16--one sixteenth--of the amount of 14C radioactivity of normal bones in living bodies. The half-life of 14C is 6000 years. Roughly how long has the individual been dead?
A) 24, 000 years
B) 6000 years
C) 30,000 years
D) 36,000 years
E) Impossible to tell from the given information.
A
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The interstellar clouds called molecular clouds are
A) the cool clouds in which stars form. B) the clouds in which elements such as carbon, nitrogen, and oxygen are made. C) the clouds that are made mostly of complex molecules such as carbon dioxide and sulfur dioxide. D) the hot clouds of gas expelled by dying stars.
A mirror forms an image in
a. a reflecting telescope. b. your eye. c. a and c. d. b and c.
State Heisenberg's Uncertainty Principle
What will be an ideal response?
The ideal gas model assumes that molecules have infinitesimal size. Consider one molecule bouncing around in the container. As the molecule’s size increases relative to the size of the container, how will the average pressure P that it exerts change, other things being held constant?
A. P increases. B. P does not change. C. P decreases. D. One does not have enough information to say.