When we think of electric potential difference, we are thinking about
A) current.
B) voltage.
C) resistance.
Answer: B
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We expect a scientific theory to be able to make predictions that can be tested. Which of the following is a prediction of the nebular theory that has been verified by observations?
a. Large planets should have at least some moons that are larger than the smallest planets. b. Planetary orbits should lie in approximately the same plane as the disk of the Milky Way Galaxy. c. Earth-size planets should have fairly large moons. d. Many stars should have planets.
The ideal shape for the primary mirror of a telescope is __________
Fill in the blank(s) with correct word
Why is ultraviolet light not transmitted by glass?
What will be an ideal response?
Fresh water enters the ocean by runoff from streams and rivers,
A) precipitation of rain over the ocean, and evaporation of coastal waters. B) evaporation of surface water, and melting of glacial ice. C) precipitation, and melting of glacial ice. D) none of these