Atrained singer can release 4 liters of air from his/her lungs after each deep breath. from the triangular waveform (rossing, fig. 15.6), we can estimate that each puff of air contains 2.0 cm3 (2.0 x 10-3 liters). if the singer sounds the e3 note (165 hz), there are air puffs emitted per second.

frequency or wavelenth of em radiation in a vacuum

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explanation:

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000

energy stored in the capacitor= 9.72 x 10⁻⁴ j

explanation:

the energy stored in the capacitor is given by

e= 1/2 c v²

e= energy stored

c= capacitance= 1.5 µc= 1.5 x 10⁻⁶f

v= potential difference=36 v

so energy stored= e= 1/2 (1.5 x 10⁻⁶) (36)²

energy stored= 9.72 x 10⁻⁴j