Polaroid sunglasses help when skiing on snow on a sunny day by reducing the sunlight from the snow. This light from the snow has been polarized by:
a. selective absorption.
b. reflection.
c. double refraction.
d. scattering.
b
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Which of the following nuclear fuels does a one-solar-mass star fuse over the course of its entire evolution?
a. hydrogen b. hydrogen and helium c. hydrogen, helium and carbon d. hydrogen, helium, carbon, and neon e. hydrogen, helium, carbon, neon, and oxygen
One aspect of a hybrid page layout may be to set a maximum screen width at which the webpage displays.
Answer the following statement true (T) or false (F)
The place the Sun stops its northward motion along the ecliptic is the:
A) equator. B) prime meridian. C) summer solstice. D) vernal equinox. E) node of the ecliptic.
An astronaut drops a rock on the moon. It falls 1 meter in 1 second. In 4 seconds, it falls a total distance of
A) 8 meters. B) 4 meters. C) 9 meters. D) 12 meters. E) 16 meters.