Which of the following is not a general feature of the Moon's surface?
a. Dry ocean plains
b. Multiring basins
c. Secondary craters
d. None of these; that is, all these features are present
a
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What will most likely be the long-term future of the MWG?
(More than one answer possible.)
A.In a few trillion years, all the stars, gas, and dust of the MWG will be consumed by the supermassive black hole at the galaxy's core. This will be a bad day.
B.As time goes by there will be greater and greater enrichment of the heavier elements. Stars that form from the enriched ISM will have higher levels of metallicity.
C.In a few billion years, the MWG and Andromeda galaxy (M31) will merge. During the merger, great tidal streams of stars will be drawn out of both galaxies. Ultimately, the two spiral galaxies will blend into a single galaxy.
An object of mass 8.0 kg is attached to an ideal massless spring and allowed to hang in the Earth's gravitational field
The spring stretches 3.6 cm before it reaches its equilibrium position. If this system is allowed to oscillate, what will be its frequency? A) 2.6 Hz B) 0.0045 Hz C) 0.67 Hz D) 2.1 Hz
For general projectile motion with no air resistance, the horizontal component of a projectile's velocity
A) continuously decreases. B) first decreases and then increases. C) remains a non-zero constant. D) remains zero. E) continuously increases.
A description of the severity of the damage caused by an earthquake is given by its ranking on the ______________ scale
Fill in the blank(s) with correct word