Recent content by willyengland

Exciting ...

Agree; the question wasn't clear, which is why I asked for clarification. An illustration would have been helpful.

I agree and remember that I found this mysterious back then. Think of it as "dividing by zero", which is forbidden. So, this simplification is forbidden.

I don't understand the question. The dirt particle sits on the rim of the wheel, is flung upwards, and flies off. Then it falls vertically back down and lands on the wheel. Is that the idea?

You can find the pdf online, e.g. https://webhomes.maths.ed.ac.uk/~v1ranick/papers/niven.pdf

Perhaps: Malcolm Levitt "Spin dynamics" Wiley

What is "the multiverse" exactly? Why "surely"? Why gravity in particular? Why not electromagnetic interaction?

I'm a layman in this field. In my opinion, there's a difference between expressing a probability as 0.1234 and as 0.000001234. The latter is more precise, isn't it?

Then there will be the problem that Mars will be contaminated with biological material.

Let's say I have two beams, one with protons and one with electrons, traveling parallel to each other at the same speed. I'm looking at them from above. Do the beams converge or diverge? As a layman I would say, they converge.

A multi-photon absorption might happen I think under extreme conditions like a strong laser.

You are right. That's what I meant.

The discovery is nothing new. It's now being brought back to light in order to possibly avoid the feared budget cuts. Mars Sample Return has essentially been canceled, which is very sad, given that billions have already been invested in this complex mission. ESA is also involved. :frown:

Btw, the continued fraction with all ones is the golden ratio and it converges extremely slowly. In this respect it is the most irrational of all numbers.

What is a "null surface"?