Areciprocating compressor is a device that compresses air by a back-and-forth straight-line motion, like a piston in a cylinder. consider a reciprocating compressor running at 150 rpm . during a compression stroke, 1.60 mol of air is compressed. the initial temperature of the air is 390 k, the engine of the compressor is supplying 7.4 kw of power to compress the air, and heat is being removed at the rate of 1.4 kw . calculate the temperature change per compression stroke.

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

Connie has $660,000 she wants to save. if the fdic insurance limit per depositor, per bank, is $250,000, which of these way is distributing her money between three banks will guarantee that all of her money is insured ?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?