Recent content by Willfrid Somogyi

You can't prove that, I've got the force man! We just can't detect them yet

You got me!

You should find for the first question that 0.3N is less than the threshold force that will produce toppling when the angle is 45 and that for part two 0.45N with an angle of 15 is greater than the threshold force

Yes, exactly. I'm not sure where you got 60 from, the weight is 0.1*g, but yeah the LHS is correct if F is P and a is θ

When resolving moments the forces all need to be taken along the same line from the pivot point, otherwise it's like trying to resolve around a corner. At the moment your 'Psinθ' is acting against friction whereas your 'Pcosθ' is the force acting against the moment of the weight. You only need...

I think Lucas' scrolling pre-text should have been used to explain these instead of some civil war backstory.

By constant do you mean "if it stays the same as the block tips"?

Sorry, I posted my last reply before I'd seen yours. Okay, ignore my second solution. Now you've got the correct distance but you are adding the components of P in vertical and horizontal directions (cosθ and sinθ) rather than finding the component of P which acts perpendicular to the line...

You need to use Pythagoras, the two sides of the cube (vertical and horizontal) give you two sides of a right angle triangle. There is an easier way to solve this problem though: Often with these problems the easiest way to solve it is to take components of the two forces such that they are...

Looking at your equation for moments about E, it looks as though you haven't correctly calculated the distance to to point of action of P. If the sides are of length 0.04m then what is the length of the diagonal from E to P?

I suppose the fact they speak English is just pure conicidence XD

Yeah, that's a much simpler way to put it but I was also wondering if anyone could tell me what happens after Bragg's law breaks down

One big plot hole seems to be the fact Star Wars is set a long time ago in a galaxy far, far away and yet somehow there are humans. Can anyone tell me whether they are actually humans or whether they just have an extremely uncanny resemblance but are in fact another species, is there concrete...

So we have the standard diffraction equation for crystals, being: nλ = 2dsinθ. If we keep the wavelength and the lattice parameter the same then n simply depends on θ. So there must be a maximum order diffraction ring that you could obtain as once you get to 90° you're essentially going in the...

Not exactly the same but NASA converted the electromagnetic fields of the planets into sound and it's pretty amazing () I'd imagine you could do a similar sort of thing with a supernova.