Which of these spacecraft did NOT go to Jupiter?
A) Voyager I
B) Voyager 2
C) Cassini
D) Mariner 9
E) Galileo
Question 2Suppose you find a rock that contains 10 micrograms of radioactive potassium-40, which has a half-life of 1. 25 billion years.
By measuring the amount of its decay product (argon-40 ) present in the rock, you conclude that there must have been 80 micrograms of potassium-40 when the rock solidified. How old is the rock? A) 1.25 billion years
B) 2.5 billion years
C) 3.75 billion years
D) 5.0 billion years
Question 3As a 4-10 solar mass star leaves the main sequence on its way to becoming a red supergiant, its luminosity:
A) decreases.
B) first decreases, then increases.
C) increases.
D) remains roughly constant.
E) first increases, then decreases.
Question 4A planet is detected via the Doppler technique. The shape of the periodic velocity pattern tells us
A) the planet's size.
B) the planet's mass.
C) the planet's density.
D) the orbital period of the planet.
E) the orbital eccentricity of the planet.
Question 5Together, which two gases make up 99 of Jupiter's atmosphere?
A) Ammonia and Methane
B) Water Vapor and Methane
C) Helium and Ammonia
D) Hydrogen and Ammonia
E) Hydrogen and Helium
Question 6A planet is detected via the Doppler technique. The repeating pattern of the stellar motion tells us
A) the planet's size.
B) the planet's mass.
C) the planet's density.
D) the orbital period of the planet.
E) the orbital eccentricity of the planet.
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