Doppler Effect Demonstration Apparatus, 92dB buzzer, 0.8m tether. Nylon cord is 2ft 8in attached to a rugged ABS handle 8.5in long, (1in diameter), Swing the apparatus and students will be able to hear the change in frequency, Dimensions: 4.5 x 5 x 3 in
Pair Of Tuning Fork - Steel, Includes: (2) Tuning Forks With Bases, One Is Adjustable (1) Mallet, For Demonstrating The Production Of Beat Frequencies. Comprises Two Nickel Plated Forks A (440 Hz) Mounted On Individual Boxes
Tuning Forks Set Of 8 Steel, For Physics Experiments, Includes: (8) Tuning Forks Nickel-Plated, Plain Shanks, With Frequency Marked, C (256), D (288), E (320), F (341), G (384), A (426), B (480), C (512). Set Supplied In Wooden Case.