Joule's paddle wheel: mechanical equivalent of heat
Falling weights turn paddles in water: the water warms by ΔT = Mgh·n/mc. Compute J = W/Q ≈ 4.18 J/cal and see heat losses.
About this experiment
| Subject | Physics |
|---|---|
| Class | 11 |
| Chapter | 11. Thermodynamics |
| NCERT section | 11.4 |
| Level | NCERT level |
| Time | about 12 minutes |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the physics behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: Joule · mechanical equivalent of heat · work and heat · paddle wheel