Resonant Tuning Fork Pair on Pine Boxes with Mass and Mallet, 440Hz cylinder Reel of 30 SWG bare

Reel of 30 SWG bare copper wire totaling about 1150 feet by mass

Short-form Euro-design 500mL polypropylene measuring pitcher features molded graduations and a pour spout for autoclavable chemical-resistant workflows

Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

Copper-block plug key switch with two 4mm terminals and a removable plastic-guarded plug

Low-noise 220V blower with a detachable 60-inch hose and adjustable flow control

Resonant Tuning Fork Pair on Pine Boxes with Mass and Mallet, 440Hz cylinder Reel of 30 SWG bareUsed to demonstrate beat frequencies and sympathetic resonance, this pair of 440Hz steel forks sits on pine resonance boxes (7. 5 x 4 x 2. 5 inches) with one fork carrying an adjustable tuning mass.