SW-2913 - ESAW Sound Spectrum Chart Did you know that a vibrating guitar string moves the air and produces sound? This unique chart presents ingredients of sound including pitch, tone, pressure, and vibration. An activity guide provides ideas for experimentation, particularly suitable for middle ...

SW-2922 - ESAW Elongation of Spring Apparatus A spiral spring of 15mmdiameter and 10cmis firmly attached to a rigid clamp of a stand at its upper and with the help of a chucknut. A sloped weight(50×5 gm set) is attached to its lower end. A pointer is fixed in a horizontal position at the lower en...