How can i tell whether or not a covalent bond is polar or not?

You have to find the difference between the electronegativity of the atoms

Perimeter? wheres the answers

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.