In a home steam radiator, thermal energy is released mainly by

A) evaporation.
B) condensation.
C) sublimation.
D) none of the above


Answer: B

Physics & Space Science

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What do we mean when we say that two light rays striking a screen are in phase with each other?

A) When the electric field due to one is a maximum, the electric field due to the other is also a maximum, and this relation is maintained as time passes. B) They are traveling at the same speed. C) They have the same wavelength. D) They alternately reinforce and cancel each other.

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Methyl salicylate is an ester commonly called

a. glycerine. b. oil of wintergreen. c. heroin. d. chloroform. e. methamphetamine.

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Proportional Reasoning: Two cars are traveling at the same speed and hit the brakes at the same time. Car A decelerates (decreases its velocity) at twice the rate of car B. If car B takes time T to stop, how long does it take car A to stop?

A. 4T B. 2T C. T D. T /2 E. T/4

Physics & Space Science

What is the drag coefficient CD?

What will be an ideal response?

Physics & Space Science