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Hi there, here is my answer: forgive my formatting Answer|dB = 10 log I / I (threshold intensity ) = 10 log 4(1 x 10^-4 W/m^2) / 1 x 10^-12 W/m^2 = 86dB, so final is 86dB Here is my question : A soprano saxophone is considered an open pipe resonator. If the pipe was straightened out it would be 65 ...

Find the work performed by 2.5 moles of oxygen isothermally expanding at 25◦C from 1.5 atm to .75 atm of pressure.(Answer preferred in Joules). Generally, the person who answers asks the question, but it's fine. P = \frac{(2.5 mol)R(298.15 K)}{V} V_i = \frac{(2.5 mol)R(298.15 K)}{1.5 atm} V_f = \fr...

Find the work performed by 2.5 moles of oxygen isothermally expanding at 25◦C from 1.5 atm to .75 atm of pressure.(Answer preferred in Joules).