What happens to the rotation of a molecular cloud as it collapses to form a star?
A) The rotation rate remains the same and results in stellar rotation.
B) The rotation dissipates and any residual is left in small overall rotation of the star.
C) The rotation rate increases and results in fast rotation of the star.
D) The rotation rate increases and results in a flattened disk of material around a protostar.
E) The rotation increases the speed of collapse and produces more massive stars.
D
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Compared to our Sun, a typical white dwarf has:
A) about the same mass and density. B) about the same mass and a million times higher density. C) a larger mass and a 100 times lower density. D) a smaller mass and half the density. E) a smaller mass and twice the density.
Consider a small satellite moving in a circular orbit (radius r) about a spherical planet (mass M). The period does not depend upon
A) g at the satellite position. B) the planet mass. C) the satellite mass. D) the radius r. E) the universal gravitational constant.
Gaps in the asteroid belt occur at distances where
A) the density of asteroids was once so high that collisions pulverized the asteroids into dust. B) the period of an orbiting asteroid would be a simple fraction (like 1/3 or 1/4) of Jupiter's orbital period. C) the period of an orbiting asteroid would be the same as Jupiter's orbital period. D) the period of an orbiting asteroid would be the same as Mars's orbital period. E) the orbit would take the asteroid beyond the "frost line" in the solar system.
Explain the slope of your graph