Suppose that the Sun shrank in size but that its mass remained the same. What would happen to Earth's orbit?
A) The size of Earth's orbit would shrink, and it would take less than one year to orbit the Sun.
B) Earth's orbit would expand, and it would take more than one year to orbit the Sun.
C) Earth's orbit would be unaffected.
D) Earth would change from a bound orbit to an unbound orbit and fly off into interstellar space.
C
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The compact disc stores information by means of
A) holography. B) pits and lands. C) Compton scattering. D) stimulated absorption. E) the photoelectric effect.
The Sun's path, as viewed from the equator, is highest in the sky on
A) the December solstice. B) the March and September equinoxes. C) the June solstice. D) the day when Earth is closest to the Sun.
Most extrasolar Neptunes and Jupiters found to date have
A) orbits very close to their parent stars, making them hot Neptunes and hot Jupiters. B) orbits that are more eccentric than those of planets in our solar system, with eccentricities greater than 0.1 C) orbits that are less eccentric than those of planets in our solar system, with eccentricities less than 0.01. D) much larger orbits than the jovian planets in our solar system.
Which of the following planets' average density is closest to that of Earth?
A) Mercury B) Mars C) Venus D) Neptune