The absorption lines we find in quasar redshifts that arise from intervening gas clouds show even larger redshifts than the quasar spectra, due to dust absorption
Indicate whether the statement is true or false
FALSE
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What is the term for the length of day measured by the rotational period of the Earth with respect to the stars?
sidereal day lunar day apparent day solar day
A 2.3 cm tall statue is 15. cm in front of a convex mirror. The mirror radius of curvature is 18. cm. (a) Is the image real or virtual? (b) How far is the image from the mirror? (c) Is the image upright or inverted? (d) How high is the image?
What will be an ideal response?
To keep chickens in a chicken coop warm, the kind of lamp to use is
A) fluorescent. B) CFL. C) incandescent. D) LED. E) all about the same
When a steaming-hot aluminum soda can is quickly inverted into a pan of water, the can is dramatically crushed due to a rapid decrease in internal pressure caused by
A) contact with the cooler water. B) sudden slowing of internal air and steam molecules. C) condensation of steam inside. D) reduced thermal energy. E) rapid conduction of heat to the relatively cool water.