Venus's surface temperature is fairly uniform from the equator to the poles because
a. Venus rotates very rapidly, which causes strong zonal winds.
b. Venus is covered by a thick cloud layer that absorbs most of the sunlight that falls on it.
c. the carbon dioxide in Venus's atmosphere efficiently emits infrared radiation.
d. Venus rotates slowly so Coriolis forces do not disrupt Hadley circulation.
e. Venus's orbit is nearly perfectly circular.
d. Venus rotates slowly so Coriolis forces do not disrupt Hadley circulation.
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Red dwarf stars (stars between 0.08 and 0.5 solar masses) evolve very differently than other stars as they age because ____
a. they are formed from pure hydrogen b. they never reach the minimum temperature required to fuse carbon c. they never form white dwarf as remnants d. they are always part of a close binary system e. their interiors are well mixed, through strong convection
The gravitational force between two objects can be described using the equation Fg = G M1 M2 / d2. In this equation, what does G represent?
A) the universal gravitational constant B) the density of the smaller object C) the distance between the two objects D) the gravitational mass of the larger object
If successive generations of stars return material back to the interstellar medium which is enriched in heavier elements, then we expect that old stars are ________ compared to younger stars
Fill in the blank(s) with correct word
When spearing a fish with a regular spear, to compensate for refraction, throw your spear
A) directly at the sighted fish. B) above the sighted fish. C) below the sighted fish.