The frequency of red light is ________ that of a green light.

A. greater than
B. the same as
C. less than
D. greater than, the same as, or less than, depending on a source of light


Answer: C

Physics & Space Science

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Why does Earth's atmosphere contain much less carbon dioxide than Venus's atmosphere?

A) Earth's volcanoes did not outgas as much carbon dioxide as those on Venus. B) Most of Earth's carbon dioxide was lost to space during the heavy bombardment. C) Chemical reactions with other gases destroyed the carbon dioxide and replaced it with the nitrogen that is in the atmosphere now. D) Most of Earth's carbon dioxide dissolved in the oceans, where it became incorporated into carbonate rocks. E) Earth formed farther from the Sun, and there was less carbon dioxide at great distances in the solar nebula.

Physics & Space Science

The motor of one car is more powerful than the motor of another car. Which of the following must be true of the more powerful motor?

A) It can do work more quickly B) It can operate for a longer time. C) It can burn fuel more efficiently. D) It can store more potential energy.

Physics & Space Science

Most stars in the Milky Way probably formed

A) alone. B) in intergalactic space, then were swept up into the Galaxy. C) in clusters in the Galaxy's spiral arms. D) from planetary nebulae. E) in the galactic Nucleus, then migrated outward later.

Physics & Space Science

The average velocity of a car traveling with a constant acceleration during a certain time interval is equal to the mean of the velocities at the beginning and end of that time interval

Indicate whether the statement is true or false

Physics & Space Science