| F+15+0 | UV light hits charged zinc plate and discharges electroscope. | 2021-09-16 |
| F+30+0 | Tunneling:Microwave analogy using wax prisms. | 2021-10-14 |
| F+30+0 | Tunneling:Microwave analogy using wax prisms. | 2021-10-19 |
| B+15+1 | Three large pendulums coupled with two springs. | 2021-08-31 |
| B+25+20 | Suspended slinky on threads for compression wave. | 2021-08-31 |
| B+25+20 | Suspended slinky on threads for compression wave. | 2021-09-02 |
| B+25+20 | Suspended slinky on threads for compression wave. | 2021-09-07 |
| F+20+5 | Rutherford scattering model: Steel balls, launcher, and "hill". | 2021-09-23 |
| B+25+10 | Rubber rope stretched across front of room. | 2021-08-31 |
| B+25+10 | Rubber rope stretched across front of room. | 2021-09-02 |
| B+25+10 | Rubber rope stretched across front of room. | 2021-09-07 |
| C+70+15 | Ring and ball: Ball fits through ring only after ring is heated. | 2021-12-07 |
| C+22+15 | Operating Sterling cycle engine, hot water powered. | 2021-12-07 |
| F+20+20 | Mechanical models of the hydrogen atom. | 2021-09-28 |
| F+15+5 | Light through different filters into phototube changes current. | 2021-09-23 |
| F+15+5 | Light through different filters into phototube changes current. | 2021-09-28 |
| C+20+25 | Food coloring added to cold, room temperature, or hot liquid | 2021-12-07 |
| C+65+25 | FLIR T200 Infrared camera | 2021-09-14 |
| C+65+25 | FLIR T200 Infrared camera | 2021-09-16 |
| C+55+60 | Equipartition of Energy: Different mass balls bounce out at different times. | 2021-12-07 |
| F+10+0 | Electron diffraction by aluminum and graphite on CRT. | 2021-09-23 |
| E+45+25 | Commercial Polaroid filters on an OHP. | 2021-09-09 |
| E+45+25 | Commercial Polaroid filters on an OHP. | 2021-09-14 |
| B+55+5 | Chladni's disc: Bowed disk forms patterns in sprinkled salt. | 2021-09-07 |
| C+55+20 | Brownian motion: Like C+55+0, with an aluminum disk added. | 2021-09-23 |
| B+25+15 | Brass spring on white plastic sheet. | 2021-09-02 |
| B+25+15 | Brass spring on white plastic sheet. | 2021-09-07 |
| C+50+5 | Black balls and white balls in a box are shaken. | 2021-12-07 |
