What was Kepler’s big breakthrough, now known as Kepler’s First Law?
a. That the stars were mobile, not stationary
b. The explanation of why planets closer to the sun traveled faster than those more distant
c. The realization that the earth was also a planet, and that the orbits of all planets were elliptical
d. The theory that the planets covered equal areas of equal duration throughout their orbit
C
Psychology
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The peak age for heroin users in treatment has increased 10 years for African Americans while:
a. declining over 10 years for European Americans b. increasing 20 years for European Americans c. Young adult African Americans no longer use heroine d. declining over 10 years by Mexican Americans
Psychology
During regular labor, contractions are:
a. painful. c. reduced by walking. b. irregular. d. unexpected.
Psychology