What was the purpose of the LCROSS mission?
a. To determine if lava still flowed beneath the crust
b. To generate an altitude map of the Moon's surface
c. To photograph geological features of the Moon
d. To photograph geological features of the Moon
e. To determine if there is water ice buried in soil of the Moon's south pole
e
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An 18-wheeler and a Volkswagon Beetle are rolling along with the same momentum. If you exert the same force with the brakes to stop each one, which takes a longer time to bring to rest?
A. 18-wheeler B. Volkswagon beetle C. same for both D. impossible to say
How does the largest asteroid, Ceres, compare in size to other solar system worlds?
A) It is larger than Pluto and Mercury. B) It is about the size of a large jovian moon. C) It is about the size of Pluto. D) It is about a quarter the size of the Moon. E) It is smaller than any jovian moon.
According to the selection rules, which of the following transitions is not allowed:
A) n = 3, ? = 2 to n = 2, ? = 1 B) n = 4, ? = 3 to n = 3, ? = 2 C) n = 3, ? = 1 to n = 1, ? = 0 D) n = 2, ? = 1 to n = 1, ? = 0 E) n = 4, ? = 2 to n = 3, ? = 2
An electron is bound in an infinite well (a box) of width 0.10 nm
If the electron is initially in the n = 8 state and falls to the n = 7 state, find the wavelength of the emitted photon. (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg)