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clc;
warning("off");
printf("\n\n example7.20 - pg318");
// given
P=749/760; //[atm] - pressure
T=21+273.15; //[K] - temperature
poak=38*(1/62.4); //[g/cm^3] - density of oak
pbrass=534/62.4; //[g/cm^3] - density of brass
m_brass=6.7348; //[g]
pair=0.001184; //[g/cm^3] - density of air
// using the formula m_oak=m_brass*((1-(pair/pbrass))/(1-(pair/poak)))
m_oak=m_brass*((1-(pair/pbrass))/(1-(pair/poak)));
printf("\n\n m_oak=%fg",m_oak);
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