If the fundamental frequency of a musical instrument is 42 Hz, what is the frequency of the second harmonic? 21 Hz
42 HZ
84 Hz
126 Hz

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.

Bis the

Answer; carbon monoxide (co);

Ithink the correct answer is 3