Hand Pump for Physics Demonstrations Subcategory_Wash Bottles this 15-inch motion-converter model shows

this 15-inch motion-converter model shows the engineering principle behind crankshaft pistons and rotary-to-linear mechanisms

Germanium diode on a transparent base with 4mm color-coded sockets and a printed circuit diagram

6 inches for clean pinhole-imaging and diffraction studies

Used to trace the invisible shape of magnetic fields

Hand Pump for Physics Demonstrations Subcategory_Wash Bottles this 15-inch motion-converter model showsHand operated pressure pump supplying positive pressure for gas law, pressure vessel, and pneumatic demonstrations, a battery free source for physics classes exploring pressure behavior.