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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.

1) according to the law of conservation of mass ,in all chemical reactions total mass is unchanged

Radioactive fallout is a result of the fission creation used to ignite the thermonuclear fusion reaction.