Physics!

4. The total distance traveled divided by the time it took.
7. How fast you're going and in what direction.
11. property that makes an ice skater spin faster when they pull their arms in.
12. The quantum "flavor" of a quark, not what your ice cream has.
13. A push or a pull, measured in Newtons.

1. What you feel when the elevator suddenly lurches up, but you still have the same amount of 'stuff.'
2. The universe's speed limit, measured in meters per second.
3. The current that only flows one way.
5. Unit of power named after a famous engineer who didn't invent the steam engine but significantly improved it.
6. The 'force' that keeps you stuck to your seat when the rollercoaster goes into a loop.
8. It's what the electron does, not the chicken, when it changes orbit.
9. What happens to light when it bounces off a smooth mirror.
10. The bend in a straw when you place it in a glass of water.