B. Chemical reactions must overcome the strong nuclear force
I can't particularly place what Icelandic contributed.
But every other culture contributed majorly.
So I would go for option b.
24hours is the correct answer
-- It takes the brick 8.9 seconds to reach the ground.
-- At the instant of the "splat", it's falling at 89 m/s.
-- The mass doesn't matter. If not for air resistance, every object
would fall at the same rate. The answer is the same for a feather,
a rubber chicken, a brick, or a school bus.
B. Sound, because everything else sits still and sound waves move
