Which of the following best describes a substance in which the temperature remains constant while at the same time it is experiencing an inward heat flow?
a. gas
b. liquid
c. solid
d. substance undergoing a change of state
d
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If you place a pipe over the end of a wrench when trying to rotate a stubborn bolt, effectively making the wrench handle twice as long, you'll multiply the torque by
A) two. B) four. C) eight.
When red, green, and blue lights shine on a golf ball, the shadows cast are
A) red, green, and blue. B) black. C) magenta, cyan, and yellow. D) none of the above
A particle (q = 3.0 mC, m = 20 g) has a speed of 20 m/s when it enters a region where the electric field has a constant magnitude of 80 N/C and a direction which is the same as the velocity of the particle. What is the speed of the particle 3.0 s after it enters this region?
a. 68 m/s b. 44 m/s c. 56 m/s d. 80 m/s e. 36 m/s
The frequency of a flood event and its magnitude is known as
What will be an ideal response?