We introduce a new experimental method for measuring liquid density:string vibration method.This innovative method is based on the generation of standing waves on the chord line in mechanical experiments.Some weights is hung on the other end of the chord line and placed in air.When a large and stable standing wave appears,the length of the chord line and the number of standing waves are measured.Then,the weights are sequentially placed into the liquid with known density and the liquid with the density to be tested.When a large and stable standing wave appears,the length of the chord and the number of standing waves are measured respec-tively.Finally,the data are inputted into the formula to obtain the density of the liquid to be tested.This experimental method is simple,novel,and the measurement are relatively accurate.
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