In physics I we looked at standing waves in pipes, both opened and closed. We discussed how open pipes produce waves that are mathematically the same as standing waves on strings. We also found that standing waves in closed pipes are only audible if the harmonic is an odd harmonic and that the length of the closed pipe is related to 1/4's of the wavelength of the wave.
In AP Chemistry we discussed formation reactions and using the Standard heat of Formation to determine the Enthalpy of reactions using Hess' Law.
In AP Chemistry we discussed formation reactions and using the Standard heat of Formation to determine the Enthalpy of reactions using Hess' Law.