What does beta particles made of?

A Beta Particle is made up of a "Positron" or an electron that that has been emitted when an atom undergoes the Beta Decay process. 

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.