What do asteroids and comets have in common?
A) They are leftover planetesimals from the era of planetary formation.
B) They all formed beyond the frost line of the early solar system.
C) They have very similar compositions of ice and rock.
D) They are all much smaller than any moons.
A) They are leftover planetesimals from the era of planetary formation.
You might also like to view...
The Bohr radius of the hydrogen atom is 0.529 × 10-10 m. The radius of the n = 2 state is
A) 1.06 × 10-10 m. B) 2.12 × 10-10 m. C) 0.265 × 10-10 m. D) 0.529 × 10-10 m. E) 2.65 × 10-10 m.
Two wires, one copper and the other steel, of equal length stretch the same amount under an applied load P. The moduli of elasticity for each is Es 5 210 GPa and Ec 5 120 GPa. The ratio of the diameter of the copper wire to that of the steel wire is approximately:
(A) 1.00
(B) 1.08
(C) 1.19
(D) 1.32
A heater is rated at 1200 watts for a 120-volt source.If two heaters are connected in parallel across the 120-volt source, the total power drawn from the source is __________
Fill in the blank(s) with correct word
The most likely way we could terraform Mars would involve
A) adding greenhouse gases to the atmosphere B) moving the planet closer to the Sun C) restarting Martian volcanoes D) firing projectiles into the polar caps