* Give examples of how such exethal focus have enfluenced scientists in the past. Discuss method by which such lias mag excluded from future scientific investigations​

Ions gain or lose electrons

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.