Physics

Questions and Answers

How do I know if my glasses have a convex or concave lens?

Questions and Answers

Suppose a fly flies around in a stationary bus and does not touch anything. The bus suddenly departs: does the fly stay ‘on...

Questions and Answers

Is it possible to understand all of our universe?

Questions and Answers

Entropy is the driving force, but a chemical system also wants as little energy as possible. How does this relate?

Questions and Answers

How come electricity can kill?

Questions and Answers

Why do your eyes glow red in a photo?

Questions and Answers

Why does the sky never turn from blue to green at night and only then to red?

Questions and Answers

Can a mini helicopter in a bus reach a higher speed than in the open air?