For a first-quarter Moon, approximately what is the angle eastward from the Sun to the Moon?
a. 30°
b. 90°
c. 180°
d. 360°
e. 0°
b
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To help keep buildings cool in the summer, dark colored window shades have been replaced by light colored shades. This is because light colored shades:
A. are more pleasing to the eye B. absorb more sunlight C. reflect more sunlight D. transmit more sunlight E. have a lower thermal conductivity
In the amended Montreal Protocol, many nations agreed to phase out, by the year 2000,
a. trash burning. b. hydrocarbons. c. gasoline automobiles. d. CFCs.
Venus' high surface temperature is due to the ________ effect
Fill in the blank(s) with correct word
Monochromatic light (? = 500 nm) is incident on a soap bubble (n = 1.4) that is 50 mm thick. What is the change of phase of the light reflected from the front surface?
a. 0 b. 180° c. ?/2 d. ?/2 e. 55°