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3B Scientific Motor, 12 V DC User Manual

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Fig. 3 (left): Excitation of longitudinal waves in a helical spring

Fig. 3 (centre and right): Excitation of transverse waves in a suspended chain and a leaf spring using a

sine wave generator

Fig. 4 : Determining the efficiency of the motor

Fig. 5: Energy in a capacitor (energy input is equal to the energy output)