Proposed Q&A site for students, professors, and researchers to ask questions about nano-science and nanotechnology

Currently in definition.

I have a couple of questions related to the diagram in the answer by Kyle Kanos to this question, Why is stress a tensor quantity?. Q1. If the box shown is of finite size why are there not three force components on each of the six faces? Q2. What happens to the stress tensor when the box shrink...

How can a post be deleted? By a user: You can typically delete your own posts at will; for exceptions, see "When can't I delete my own post?" below. To delete a post, just use the "delete" link below it. Moderators can delete any post instantly. Users with reputation >= 10k (more precisely, th...

20k users can vote to delete answers with a score of -1 or lower (at any time, I believe), but the voting lacks a check to see if the answer is an accepted answer. IIRC, accepted answers have to be unaccepted before being deleted, even by mods, so such a delete vote should be disallowed completel...

Virgin Galactic will take passengers aboard SpaceShipTwo as high as 65 miles above the surface of the earth. But from this altitude, passengers will only be able to see a certain segment of the curvature of the earth through windows as large as 17 inches in diameter. How much further into space ...

Fake random numbers Pretty much any underhanded challenge involving random numbers will have someone post this one: int getRandomNumber() { return 4; //chosen by fair dice roll. //guaranteed to be random. } It was funny when Randall Munroe did it 7 years ago, not anymore. ...