The Moon orbits the Earth the Earth orbits the Sun. If the Earth-moon system is ˜1 AU from the Sun and takes ˜1 Earth year to orbit, what is the combined mass of the triple system? Express your answer in solar mass units.
a. 1
b. 1.1
c. 1.2
d. 1.3
Answer: a. 1
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Light takes about 8 minutes to travel from the sun to Earth and about 40 minutes to travel from the sun to Jupiter. Jupiter is about ____________________ AU from the sun
Fill in the blank(s) with correct word
Assume you are not near any X-ray machines. If your eyes could only see in X-rays, what color would best describe your view of your surroundings?
a. white b. red c. violet d. black
What was the temperature of the Universe when the recombination took place that produced the cosmic background radiation we observe today?
a. about 2.7 K b. about 300 K c. about 3000 K d. about 3 million K e. about 3 billion K
Just as some chemicals must be given activation energy to start an exothermic chemical reaction, some nuclei must be given nuclear activation energy in order to undergo an exothermic fission
What will be an ideal response?