Certain types of sunglasses are very effective at diminishing light reflected from surfaces because of
a. interference.
b. diffraction.
c. specular reflection.
d. diffuse reflection.
e. polarization.
e
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Jupiter's moon _______________ appears to have a liquid-water ocean below its icy crust and may contain minerals as a source of raw material for chemical evolution
Fill in the blank(s) with correct word
The kinetic energy of a body is correctly given by which of the following expressions? (m=mass, v=speed)
A. mv2 B. mv C. (½)mv D. 2mv2 E. (½)mv2
You observe a star very similar to our own Sun in size and mass. This star moves very slightly back and forth in the sky once every 4 months, and you attribute this motion to the effect of an orbiting planet
What can you conclude about the orbiting planet? A) The planet must be closer to the star than Earth is to the Sun. B) The planet must be farther from the star than Neptune is from the Sun. C) The planet must have a mass about the same as the mass of Jupiter. D) You do not have enough information to say anything at all about the planet.
At which latitude is the noonday Sun overhead only once a year?
a. 10°S b. 23°S c. 4°N d. 30°N