At Jupiter's very center is a core of

a. heavy elements (molten rock and iron).
b. helium.
c. hydrogen.
d. heavy elements (molten rock and iron) and helium.


a

Physics & Space Science

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What do peculiar velocities reveal?

A) the amount of dark matter in a galaxy B) the distribution of dark matter in large-scale structures C) the composition of dark matter D) the error in our observations of Hubble's law E) the critical density of the universe

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Casually sneaking a quick peek at a photo in your mobile phone

A) adds energy to the photo. B) subtracts energy from the photo. C) brings you into an observer-observed relationship that intrigues some science types. D) changes the phone itself E) none of the above

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A hot pizza contains

a. heat b. internal energy c. temperature d. work e. none of the above

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A car is making a 12-mile trip. It travels the first 6.0 miles at 30 miles per hour and the last 6.0 miles at 60 miles per hour. What is the car's average speed for the entire trip?

A) 20 mph B) 35 mph C) 40 mph D) 45 mph E) 50 mph

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