How have we been able to construct detailed maps of surface features on Venus?
A) by studying Venus from Earth with powerful telescopes
B) by studying Venus with powerful optical telescopes on spacecraft that were sent to orbit Venus
C) by making computer models of geological processes on Venus
D) by using radar from spacecraft that were sent to orbit Venus
E) by landing spacecraft on the surface for close-up study
D) by using radar from spacecraft that were sent to orbit Venus
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A diffraction grating has 6000. lines per centimeter ruled on it. What is the angular separation between the second and the third orders on the same side of the central order when the grating is illuminated with a beam of light of wavelength 550
nm?
A goldfish is swimming in water (n = 1.33) inside a spherical plastic bowl of index of refraction 1.33 . If the goldfish is 10.4 cm from the front wall of the 26.4-cm radius bowl, where does the goldfish appear to an observer in front of the bowl?
a. 7.12 cm behind the plastic b. 15.9 cm behind the plastic c. 12.2 cm behind the plastic d. 8.67 cm behind the plastic e. 12.2 cm behind the plastic
The diffusion constant for water in air is 
How long would it take a water molecule to diffuse a distance of 10.0 meters?
A. 400 hours B. 450 hours C. 500 hours D. 580 hours E. 600 hours
If an extrasolar planet suddenly became larger in radius, but kept the same mass and orbit, what would change during an observed transit?
A) The amount of starlight would have a larger dip during the transit. B) The amount of starlight would have a smaller dip during the transit. C) The time between transits would decrease. D) The time between transits would increase. E) Nothing. The radius of a planet does not affect the appearance of a transit.