When the inside of a refrigerator is cooled, does thermal energy flow from hot to cold, or is it from cold to hot? Does this happen spontaneously, or is outside assistance required?
A) From cold to hot. Since this is against the normal flow of thermal energy, outside assistance is required.
B) Only the Shadow knows.
C) From hot to cold. Since this is the normal way that thermal energy flows, no outside assistance is needed.
D) From cold to hot. Since this is the normal way that thermal energy flows, no outside assistance is needed.
E) From hot to cold. Since this is against the normal flow of thermal energy, outside assistance is required.
A
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Neptune and Uranus have a bluish tint because:
A) at their distances, the Sun appears blue, the red absorbed by dust in the ecliptic. B) they are far away and distance makes objects appear bluish. C) their atmospheres contain methane, which absorbs red light. D) their atmospheres contain hydrogen and helium. E) ammonia ice reflects blue light better than any other color.
Saturn's belts and zones are obscured by haze high in its atmosphere
Indicate whether the statement is true or false
What percentage of the surface of Venus could be characterized as continental-sized highlands?
A) less than 10% B) about 30%, like the Earth C) 45% D) 75% E) 100%
An object that is 3.4 mm tall is placed 25 cm from the vertex of a convex spherical mirror. The radius of curvature of the mirror has magnitude 73 cm. (a) How far is the image from the vertex of the mirror? (b) What is the height of the image?
What will be an ideal response?