Which concept explains why frequencies of light that fell below the frequency threshold of the metal did not eject electrons? *

hail is a solid form of precipitation composed of large, layered ice particles called pellets that often have spherical shapes. this phenomenon occurs during thunderstorms in the could type known as cumulus

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32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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an energy transformation flow diagram is shown

where is it ?