Which statement about Jupiter is true?
A. It is more massive than all other planets combined.
B. It may become a star in about a billion years.
C. It is the least dense of the Giant Planets.
D. It has a solid core of ice about 1,000 km under the visible surface.
Answer: A
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The ____________________ is a measure of the clarity of the atmosphere
Fill in the blank(s) with correct word
The planet whose orbit lies nearest to the Sun is
a) Mercury. b) Venus. c) Pluto. d) Mars.
When a collision is completely inelastic, then:
a. all the kinetic energy is conserved. c. the participants stick together. b. all the kinetic energy is gone. d. the total momentum is zero.
A solar cell has a light-gathering area of 10 cm2 and produces 0.30 A at 0.80 V (DC) when illuminated with sunlight of intensity 1000 W/m2 . What is the efficiency of the solar cell?
a. 16% c. 7% b. 4% d. 24%