According to our theory of solar system formation, what are asteroids and comets?
A) the shattered remains of collisions between planets
B) chunks of rock or ice that condensed after the planets and moons finished forming
C) chunks of rock or ice that were expelled from planets by volcanoes
D) leftover planetesimals that never accreted into planets
D
You might also like to view...
You are at the leading end of a canoe and your friend is at the trailing end while the canoe is drifting along at a speed v. You toss a backpack to your friend. While the backpack is in flight, what is the canoe's speed? Ignore any friction effects between the canoe and the water
1.It is greater than v. 2.It is less than v. 3.It maintains the same speed it had before the backpack was thrown. 4.We cannot tell from the information given.
A coil is placed in a changing magnetic field and an emf is induced. What happens to the induced emf if the rate of change of magnetic field doubles?
a. The emf quadruples. c. There is no change. b. The emf increases by a factor of 16. d. The emf doubles.
Refracting Telescope: An astronomical refracting telescope is made from two lenses. The objective lens has a focal length of 114 cm, and the eyepiece lens has a focal length of 17.0 cm.(a) What is the total length of the telescope?(b) What is the angular magnification of the telescope?(c) What is the magnification by turning the telescope around and looking through the objective lens first?
A. (a) 131 cm (b) 6.71 (c) 0.15 B. (a) 97 cm (b) 0.15 (c) 6.71 C. (a) 262 cm (b) 0.87 (c) 1.15 D. (a) 194 cm (b) 1.18 (c) 0.85
When a constant and sustained upward force acts on a rocket, its acceleration increases mainly because
A) gravity becomes weaker with increased distance. B) the mass of the rocket decreases as fuel is burned. C) No way, for acceleration would be constant.