Free Fall: A laser is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is 1.5 m/s2 and there is no atmosphere. How long does it take for the laser to reach the maximum height?
A. 8.0 s
B. 11 s
C. 14 s
D. 16 s
Answer: A
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What happens when a core's density exceeds that which electron degeneracy pressure can support?
a. The core collapses to a black hole. b. The core collapses to a neutron star. c. The core collapses to a white dwarf. d. The core collapses to a neutron star or a black hole.
Which of the following best explains why an interstellar ramjet could, in theory, achieve continuous acceleration?
A) It takes advantage of theoretically possible loopholes in Einstein's theory of relativity. B) It uses fuel that is more efficient than any other known fuel. C) It collects its fuel as it goes, rather than having to carry the weight of fuel along with it. D) It has such a large fuel tank that it will essentially never use up all the fuel it carries. E) Its speed always gets faster because time dilation changes the rate at which time flows.
Webpages that display dynamically generated content typically acquire the information from a database.
Answer the following statement true (T) or false (F)
The image formed by convex lenses are
A) always upright. B) always real. C) always virtual. D) always inverted. E) none of the above.