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when blood oxygen level drops due to exercise; what effect does this have on the body?

a. you shiver

b. the friction caused by the muscles shivering warms the body.

c. oxygen is taken in more quickly from the lungs and pumped more quickly through the blood to get to the muscles and replenish the oxygen level.

d. excess body heat evaporates the sweat, which has a cooling effect on the body.

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

What is the single most important equation in all of physics?