What begins when the exercise intensity demands ATP production at a higher rate than the energy systems can supply it?
A.
Lactic acid
B.
Muscle fatigue
C.
The ATP-PC system
D.
VO2 max

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.

measure their densities same density, same sub

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered