A photon has 8.0 x 10-15 J of energy. Planck's constant is 6.63 x 10-34 Jos.
What is the frequency of the photon?
O 1.21 % 1019 Hz
O 8.3 10-20 Hz
1.21 10-19 Hz
08.3 1020 Hz
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Biology 1c cumulative exam i need awsners

What do lava flows made of aa indicate about the type of volcanic eruption that occurred? a. the eruption was viscous. b. the eruption was pyroclastic. c. the eruption was explosive. d. the eruption was quite. !

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.