Silica has a relatively
A) low melting point.
B) high melting point.
Answer: A
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Which of these is emitted when an electron falls from a higher to lower orbital?
A) a photon B) a positron C) a neutrino D) a graviton E) another electron
In water, does the molecule lysergic acid diethylamide act as an acid, a base, neither or both?
A) acid B) base C) neither an acid or a base D) both as an acid and as a base
Describe several features on the Earth's crust explained by plate tectonics
What will be an ideal response?
The second law of thermodynamics says that the total amount of entropy, or randomness, in the universe cannot decrease. However, we see all around us objects that become more ordered-for example, the development of a biological organism or water that freezes. The decrease in entropy, or randomness, in such cases does not violate the second law because
A. water and living things do not have entropy. B. there is always a greater increase in entropy somewhere else. C. energy must be added. D. energy must be removed.