About what is the smallest mass a newborn star can have?
A) 0.01 times the mass of the Sun
B) 0.08 times the mass of the Sun
C) 0.8 times the mass of the Sun
D) the mass of the Sun
E) twice the mass of the Sun
B) 0.08 times the mass of the Sun
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Both Jupiter and Saturn
a. have liquid metallic hydrogen in their interiors. b. have rings. c. emit more energy than they absorb from the Sun. d. have belt and zone circulation. e. All of the other choices are correct.
Which of the following statements is not an observed pattern of motion in our solar system?
A) Most planets orbit at the same speed. B) All planets orbit the Sun in the same direction. C) Most planetary orbits lie nearly in the same plane. D) Most planets rotate in the same direction in which they orbit. E) Almost all moons orbit their planet in the same direction as the planet's rotation.
If the acceleration vector of an object is directed perpendicular to the velocity vector,
A) the object is turning. B) the object is speeding up. C) the object is slowing down. D) the object is not moving. E) this situation would not be physically possible.
Which of the following techniques is not useful for determining the age of the universe?