Which of the following best describes what would happen if a 1.5-solar-mass neutron star, with a diameter of a few kilometers, were suddenly (for unexplained reasons) to appear in your hometown?
A) The entire mass of Earth would end up as a thin layer, about 1 cm thick, over the surface of the neutron star.
B) It would rapidly sink to the center of Earth.
C) The combined mass of Earth and the neutron star would cause the neutron star to collapse into a black hole.
D) It would crash through Earth, creating a large crater, and exit Earth on the other side.
E) It would crash into Earth, throwing vast amounts of dust into the atmosphere which in turn would cool Earth. Such a scenario is probably what caused the extinction of the dinosaurs.
A
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The terrestrial planet with the oldest surface is ____________________
Fill in the blank(s) with correct word
The following statements are all true. Which one counts as an "exception to the rule" in being unusual for our solar system?
A) The diameter of Earth's Moon is about 1/4 that of Earth. B) Venus does not have a moon. C) Jupiter has a small axis tilt. D) Saturn has no solid surface.
The longer the wavelength, the bluer and brighter the star appears
a. True b. False Indicate whether the statement is true or false
A ball drops some distance and loses 30 J of gravitational potential energy. Do NOT ignore air resistance. How much kinetic energy did the ball gain?
A) more than 30 J B) exactly 30 J C) less than 30 J