Answer:
E
Explanation:
They will boil at the same temperature.
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P (momentum) = mass x velocity
p = .5 x 20
p = 10
That's the <em><u>speed</u></em> of the wave.
("Velocity" is not a good way to say it, because 'velocity' always needs a direction,
and neither frequency nor wavelength tells anything about direction.)
It's a Angstrom Exponent. You can research that term from here.