Doubling the frequency of a photon

A. affects its energy.
B. doubles its energy.
C. both of these
D. none of the above


Answer: C

Environmental & Atmospheric Sciences

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A climate is classified as "dry" if it receives less than 30 centimeters of rain annually, on average

Indicate whether the statement is true or false

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Why are digital images generally used instead of photographs in satellite remote sensing?

a. Digital image data can be beamed back electronically from space. b. Digital images are similar to a mosaic, made up of grid cells that form a picture. c. Digital images can reproduce a wider part of the spectrum than photos can. d. Digital image data can be beamed back electronically from space, and they can reproduce a wider part of the spectrum than photos can.

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Which of the following has the lowest water solubility?

A) butanal B) heptanal C) hexanal D) pentanal

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Everything else being equal, a gradual increase in global CO2 would most likely bring about ____

A) an increase in surface air temperature B) a marked decrease in plant growth C) a decrease in evaporation from Earth's oceans D) no change in global climate

Environmental & Atmospheric Sciences