The polarization of sunlight is greatest at
A) sunrise.
B) midday.
C) both sunrise and sunset.
D) sunset.
C
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Most of the elements heavier than helium were made during the first few minutes after the big bang
a. True b. False Indicate whether the statement is true or false
What term describes the process of transformation of the first cell of a new individual into an adult?
a. inheritance b. genetics c. reproduction d. development e. sex
Astronomers often record solar images in the ____ part of the electromagnetic spectrum because the gaseous layers high in the Sun's atmosphere are very hot and emit most of their light at short wavelengths
a. microwave b. gamma c. visible light d. ultraviolet e. infrared
If the distance a spring is stretched from its equilibrium position is halved the potential energy of the spring is multiplied by
A. 4 B. 2 C. 0.5 D. 0.25