How would you describe the term diffusion
What will be an ideal response?
Diffusion is the natural tendency for substances to spread out, mix with
surrounding substances, and to become more dilute.
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Two identical balls are at rest side by side at the bottom of a hill. Some time after ball A is kicked up the hill, ball B is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ball B,
a. it has the same position and velocity as ball B. b. it has the same position and acceleration as ball B. c. it has the same velocity and acceleration as ball B. d. it has the same displacement and velocity as ball B. e. it has the same position, displacement and velocity as ball B.
How much longer does the Sun have to burn hydrogen to helium at its core?
A. about 500,000 years B. about 1 billion years C. about 1 million years D. about 5 billion years E. about 5 million years
The terrestrial planets and the giant planets have different compositions because
Choose one: A. the terrestrial planets have few moons. B. the giant planets are much larger. C. the terrestrial planets are closer to the Sun. D. the giant planets are mostly made of solids.
A magnesium alloy that begins with the letters “AK” has major alloy elements of aluminum and _________.
Fill in the blank(s) with the appropriate word(s).