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.

How does the space charge width change with forward and reverse bias? also, calculate the space charge width for a reverse bias of 4v on a silicon pn junction at t = 300k and doping concentrations of na = 5x1015cm-3 , nd = 5x 1016 cm-3 .

The mantle is made up of which structural zones?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )