Monthly Archives: March 2015

Q: After the heat death of the universe will anything ever happen again?

Physicist: If you wait forever, then you might see something happen.  But the more practical answer is: no. The universe does a lot of stuff (for example, whatever you did today), but literally everything that ever happens increases entropy.  In … Continue reading

Posted in -- By the Physicist, Entropy/Information, Physics | 23 Comments

Q: Why does kinetic energy increase as velocity squared?

The original question was: … the formula for kinetic energy is and the formula for momentum is .  I ran into these in physics class long ago and was really bothered by the first formula.  How can energy go up … Continue reading

Posted in -- By the Physicist, Physics | 6 Comments