When a light ray traveling in air meets the surface of a piece of glass, which of the following occur at the interface?
a. The light is totally reflected.
b. Some of the light is reflected back into the air.
c. Some light enters the glass and is refracted toward the normal.
d. Some light enters the glass and is refracted away from the normal..
e. All of the light enters the glass.
B, C
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When a drag strip vehicle reaches a velocity of 65.0 m/s, it begins a negative acceleration by releasing a drag chute and applying its brakes. While reducing its velocity back to zero, its acceleration along a straight-line path is a constant ?7.10 m/s2 . What displacement does it undergo during this deceleration period?
a. 595 m b. 4.58 m c. 2 110 m d. 298 m e. 9.15 m
An expandable container holds 2.30 mole of helium, He, gas with an initial pressure of 770 kPa and an initial volume of 2.10 L. The gas expands isothermally to a final pressure of 350 kPa
How much heat is gained by the gas during this process? (R = 8.31 J/mol ? K) A) 1280 J B) 792 J C) 685 J D) 1370 J E) 1700 J
When two objects of unequal mass orbit each other, the center of mass is ____
a. at the center of the more massive object b. at the center of the least massive object c. half way between the centers of each object d. always closer to the less massive of the two objects e. always closer to the more massive of the two objects
Distinguish between a precipitate and a filtrate