The chemical standard for the quantity of a mole is based on which substance? a. hydrogen-1 b. helium-2 c. oxygen-16 d. carbon-12

Earth's rotation cause the global convention current between the equator and the poles

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.

The correct answer is b.hoped i you