In one of the most stunning of all coincidences in Science,
the part of the electromagnetic spectrum that can be seen
by the human eye is labeled the "visible" spectrum.
with 50 km/h = 15m skid
so, 150 km/h = 45m skid
multiply sides by 3, make them proportional to each other!!!
The term that is used to describe the energy needed to start a reaction is B. Activation Energy.
Permafrost is a thick subsurface layer of soil that remains frozen throughout the year, occurring chiefly in polar regions.
I believe it would be D.