How can microwave ovens heat food more quickly than conventional ovens?
a. Microwaves give energy directly to the molecules in the food.
b. Conventional ovens must conduct heat from the surface to the interior of the food.
c. Microwaves heat the inside as well as the surface of the food.
d. all of the above
c
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The rate at which work is done is equivalent to which of the following?
a. increase in potential energy b. thermal energy c. potential energy d. power
When an earthquake occurs, the point of initial energy release is called the earthquake's ______________
Fill in the blank(s) with correct word
What fraction of the original uranium-235 should be left after 3.5 billion years?
A) 1/2 B) 1/4 C) 1/8 D) 1/32 E) 1/64
Detailed measurements of the disk and central bulge region of our Galaxy suggest our Milky Way is a
A) dwarf galaxy. B) spiral galaxy. C) very flat elliptical galaxy. D) very dusty irregular galaxy. E) quasar.