What type of stars do the spiral arms contain?
A.) The hottest, newest stars.
B.) The coldest, newest stars.
C.) The hottest, oldest stars.
D.) The coldest, oldest stars.
E.) Pecans and walnuts.
Ans: A.) The hottest, newest stars.
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Which of the following stars is a part of the Solar System?
A) The Sun B) Proxima Centauri C) Sirius D) The Pistol Star
If all of the mass in the galaxy were concentrated at its center, then orbital velocity would be high near the center and would decline away from the center
Indicate whether the statement is true or false
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.
The position of a 0.76-kg mass undergoing simple harmonic motion is given by x = (0.160 m) cos (?t/16). What is the maximum net force on the mass as it oscillates?
a. 4.7E–3 N b. 2.9E–2 N c. 6.2E–3 N d. 2.4E–2 N e. 2.4E–2 N