Which of the following statements does not apply to the formation of gas giants like Jupiter, compared to terrestrial planets?
A) accreted from icy planetesimals
B) formed in a region with lower orbital speeds
C) surface dramatically altered during bombardment
D) caused icy planetesimals to slingshot away from the Sun, to become Oort cloud comets
E) formed in regions cold enough for water to freeze
C
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An airplane flies at a constant speed at an angle of 25 degrees below the horizontal. Which statement below is not true?
A. The thrust is greater in magnitude than the drag. B. The weight is greater in magnitude than the lift. C. The net force on the plane is zero D. The plane has constant velocity.
Suppose the Hubble constant turned out to be 130 km/sec/Mpc and not 65 km/sec/Mpc. How would that affect our estimate of the age of the Universe?
A. The Universe would be about 7 billion yrs old. B. The Universe would be about 30 billion yrs old. C. It would have no effect on our estimates of the Universe's age. D. The Universe would be about 130 billion yrs old. E. None of these choices is correct.
Stellar parallax is used to measure distances of celestial bodies within the solar system
a. True b. False Indicate whether the statement is true or false