❗️Explosion at California Power Substation
A huge fire has broken out in downtown Sacramento, after an explosion at the substation.
Firefighters are currently responding to the incident, as huge plumes of smoke rise into the sky.
The nabla symbol, commonly used in math to represent the gradient of a function ∇f, is so-called because it looks like a harp and the Greek word for the Hebrew or Egyptian form of a harp is "nabla".
Maxwell's equations are a set of partial differential equations at the foundation of classical electromagnetism, optics, and electric circuits.
https://t.co/1SQPhD7O0P
In AD 301, Roman Emperor Diocletian issued a price edict to curb rampant inflation. It set prices for more than 1200 items:
(prices in denarii)
🧈 1lb Butter - 16
💰 1lb Gold - 72k
🦁 Lion - 150k
Learn more about the Roman Economy in this week's paper:
https://t.co/ChVBE28ILA
This week's paper is: "Heads or Tails: The Impact of a Coin Toss on Major Life Decisions and Subsequent Happiness", by Steven D. Levitt.
Here's the annotated version: https://t.co/86Z7NX8mAN