On an H-R diagram, stellar radii
A) are greatest in the lower left and least in the upper right.
B) decrease from left to right.
C) are impossible to determine.
D) increase diagonally from the lower left to the upper right.
D
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Interstellar dust consists mostly of
A) microscopic particles of carbon and silicon. B) ozone "smog." C) hydrogen and helium atoms. D) tiny grains of water ice. E) the same tiny particles found in household dust.
The following figures show four positions of a comet during its orbit of the Sun. Also shown is the orbit of the Earth around the Sun. Rank the positions of the comet from left to right based on the expected size of its tail, from shortest to longest. (Not to scale; tails not shown.)
What will be an ideal response?
A proton is accelerated from rest through 500. V. It enters a magnetic field of 0.300 T oriented perpendicular to its direction of motion. Determine:
(a) the radius of the path it follows. (b) the frequency with which it moves around this path.
Seawater movement that arises from incoming ocean waves that break at an angle to the shore is called a(n) ______________ current
Fill in the blank(s) with correct word