A typical flying insect applies an average force equal to twice its weight during each downward stroke while hovering. Take the mass of the insect to be 7.0g , and assume the wings move an average downward distance of 1.5cm during each stroke. Assuming 117 downward strokes per second, estimate the average power output of the insect.

Average power = 0.240Watts

Explanation:

The insect requires double the force on its wings to counteract the gravitational force pulling it down.it generates upward force as below

Upward Force=2Gravitational force

force =2x(mass x gravitational pull)

F=(0.007x9,8)x 2

F=0.137 Nm

Power generated is =work/time

power =force *displacement/time

convert 1.5cm to SI units meters=0.015meters

displacement in one second is=0.015 x number of strokes

displacement =0.015*117

displacement =1.755 meters

power=(0.137*1.755)/1second

power=0.240 Watts

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an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.