Degreeda, the Equipartition Dreamer Mug
Equipartition: ½kBT per quadratic degree of freedom; frozen modes at low T contribute nothing.
The joke: Frozen-out degrees of freedom: grad-student burnout. The slogan on the mug reads ½kT PER DEGREE OF FREEDOM. I HAVE NONE LEFT.
Source: L. Boltzmann, Wien. Ber. 63, 679 (1871); K. Huang, Statistical Mechanics (Wiley, 1987).
Shipping calculated at checkout by destinationMade to order, ships in ~10 days
Details
Size & material11oz · 15oz
Black glossy ceramic mug with a C-handle. Lead- and BPA-free.
- 11oz: 0.33 l
- 15oz: 0.44 l
CareDishwasher & microwave safe
Dishwasher safe (top rack) or hand wash. Microwave safe.
ShippingBy destination
Shipping calculated at checkout by destination.
Made to order: about 10 days of production and handling before it ships.
Returns & replacements21 days
Every item is printed to order, so we can’t accept returns or exchanges for change of mind, or if you ordered the wrong size or colour.
Print defect, misprint, damage or the wrong item? We’ll send a free replacement, or a refund if you prefer. Report it within 21 days of delivery with a photo; no need to send it back.
The physics
Equations
| Symbol | Meaning | Unit |
|---|---|---|
| \(\langle E \rangle\) | mean energy | \(\mathrm{J}\) |
| \(k_B\) | Boltzmann constant | \(\mathrm{J/K}\) |
| \(T\) | temperature | \(\mathrm{K}\) |
Sources
- L. Boltzmann, Wien. Ber. 63, 679 (1871)
- K. Huang, Statistical Mechanics (Wiley, 1987)
Field notes
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