Which of the following is not a metamorphic rock?
a. Sandstone
b. Schist
c. Slate
d. Marble
a
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Cepheids and globular clusters are limited in their ability to measure the distance to galaxies because they ____
a. are too rare b. are not bright enough to detect at large distances c. behave differently in other galaxies than they do in our own d. do not appear in dwarf galaxies e. are only found in elliptical galaxies
The assumption of isotropy states that
a. the Universe looks the same at all epochs. b. the Universe looks the same from all locations over sufficiently great distances. c. the Universe looks the same in all directions over sufficiently great distances. d. the Universe looks the same at all epochs, the Universe looks the same from all locations over sufficiently great distances, and the Universe looks the same in all directions over sufficiently great distances. e. None of the other choices are correct.
What "imperfections" on the Moon were visible to Galileo's telescopes?
What will be an ideal response?
A sound intensity of 70 dB is observed at a distance d from the source of sound. What sound intensity would be observed at a distance 2d from the source?
a. 68 dB b. 67 dB c. 64 dB d. 62 dB