How are the wavelength and frequency of an electromagnetic wave related?
What will be an ideal response?
An electromagnetic wave can be described by: . Thus, the longer the wavelength, ?, of an electromagnetic wave, the lower must be its frequency, ?, and vice versa.
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Russia forcibly annexed which peninsular part of Ukraine in 2014?
A) Siberia B) Chechnya C) Kamchatka D) Crimea E) Kaliningrad
At which point or points does the current flow fastest in the center of the channel?
A) A
B) B
C) C
D) D
Which of the following factors, responsible for large-scale temperature changes presently being experienced, has changed decisively due to human activity?
a. stratospheric volcanic sulfate aerosols b. climate variability c. solar radiation d. greenhouse gases e. snow-albedo effect
As chemical pesticides move through the trophic pyramid, they may become increasingly concentrated at each higher level in a process called
A) pyramidal decay. B) trophic cascading. C) competitive exclusion. D) bioremediation. E) biological amplification.