What planet is this, and how do you know?
A) Saturn because of its colors and bright, wide rings
B) Saturn because it is the only planet with rings
C) Jupiter because it is the biggest planet and has the biggest rings
D) Neptune because it has the brightest rings of any planet
E) Jupiter because of its colors and bright, wide rings
A) Saturn because of its colors and bright, wide rings
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A rocket is fired in a gravity-free environment in deep space. The rocket has an initial mass of 8000 kg and ejects gas with a velocity of 2000 m/s. How much gas must be ejected in the first second to give the rocket an acceleration of 30.0 m/s2?
A) 120 kg B) 7.50 kg C) 15.0 kg D) 12.0 kg E) 150 kg
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 reason) to appear in your home town?
A) The combined mass of Earth and the neutron star would cause the neutron star to collapse into a black hole. B) It would rapidly sink to the center of Earth. C) The entire Earth would end up as a thin layer, about 1 cm thick, over the surface of the neutron star. D) It would crash into Earth, throwing vast amounts of dust into the atmosphere that, in turn, would cool the Earth; this is probably what caused the extinction of the dinosaurs.
Methane-rich atmospheric planets ______________ and ________________ probably formed closer to the Sun and migrated outward
a. Jupiter and Saturn b. Saturn and Uranus c. Uranus and Neptune d. Jupiter and Neptune
If you add two vectors with magnitudes of 200 and 40, which of the following is the only possible resultant?
A. 100 B. 260 C. 0 D. 200 E. 40