When gaseous elements combine:
a. infinite amounts of each gas can combine in the same space because gases are not matter.
b. very precise ratios of each gas combine to form gaseous compounds.
c. gases only combine as mixtures, not as compounds.
d. most cannot form compounds because they are already in the form of diatomic (i.e. two-atom) molecules.
e. they form compounds with unpredictable ratios of each element.
b
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Which of the following is not a point defect?
(a) Dislocation (b) Interstitial (c) Vacancy (d) Frenkel
When a glass rod is rubbed with silk, which of the following statements best describes what happens?
a. Electrons are removed from the rod. b. Protons are removed from the silk. c. The silk is charged positively. d. The silk remains neutral.
As the speed of an object decreases, its wavelength
a. remains unchanged. b. decreases. c. increases. d. is zero.
An object moves in a direction parallel to its length with a velocity that approaches the velocity of light. The length of this object, as measured by a stationary observer,
A) approaches infinity. B) approaches zero. C) increases slightly. D) decreases slightly. E) does not change.