Mercury's average density is about 50% greater than the Moon's, even though the two bodies have similar radii. This suggests that Mercury('s)
A. interior is much richer in iron than the Moon's.
B. must have a liquid water core.
C. greater mass has prevented its gravitational attraction from compressing it as much as the Moon's is.
D. contains proportionately far more rock than the Moon.
Answer: A
You might also like to view...
If a quasar has a recessional velocity of 2.7x 105 km/sec and is determined to be 3600 Mpc, what is the Hubble constant based on this quasar alone? Hint: Note that the units of your result should be (km/sec)/Mpc to see what arithmetic process you need to do on a calculator
a. 50 km/sec/Mpc b. 9.7x 108 (km/sec)Mpc c. 75 km/sec/Mpc d. 0.013 km/sec/Mpc e. 273,600 km/sec/Mpc
A child is standing at the rim of a freely rotating disk holding a rock. The disk rotates without friction. The rock is dropped at the instant shown. As a result of dropping the rock, what happens to the angular velocity of the child and disk?
If the Moon was originally a small planet orbiting the Sun, which was then captured by Earth's gravity, what can we predict about the composition of moon rocks collected by Apollo astronauts?
A. Moon rocks should have some similar, and some different compositional characteristics. B. Moon rocks should have a composition that is the same as Earth's crust. C. Moon rocks should have the same composition as rocks found on Earth. D. Moon rocks should have a completely different composition than rocks found on Earth.
A light bulb is connected to a battery as shown in Figure A below. When a second bulb is connected as shown in Figure B, what happens to the brightness of the original bulb?