What is the potential energy of a .5 kg ball sitting on a table 1 meter above the ground

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A.(nh4)(2co3)is the correct answer 

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.