And help you learn physics.

Geeks and nerds are cool again, thanks to 'Stranger Things,' but being a member of Hawkins AV Club is much more than watching superhero movies, reading comic books and playing RPG games.

It's learning physics, biology, chemistry, math, and programming. And all that knowledge made the gang ready to fight demons.

Whether you're planning on fighting demons from another dimension or not, we've created a couple of cool new physics tools in recent weeks. What are they?

Efficiency Calculator

It's hard to go through the full 8 hours of work without checking Facebook or Twitter once in a while. But if you're organized and don't get that easily distracted, you can finish all your tasks in less than 8 hours and have plenty of time to watch more episodes of 'Stranger Things.'

That's called efficiency. And it has different applications and names. There's Rate of Investment, and there's fuel usage. There's player efficiency rating in basketball and engine efficiency in thermodynamics.

Which brings us to our Efficiency Calculator. It's as simple as it gets. Just divide the energy output by energy input, and you get the efficiency. The bigger the percentage is, the less energy is wasted in the process.

Like in life, the more you can do with the small amount of energy, the more efficient you are.

Efficiency Calculator