Recent content by JHamm

Place a large block of wood underneath each side.

What do neutrinos and I have in common? <inappropriate joke removed>

A concept is a broad idea, things like energy and momentum conservation, Newton's laws, how work and energy go together. He's emphasising that you need to learn to understand what is going on rather than just learning the steps to solving a "projectile motion" problem or a "circular motion" problem.

The photon is not a wave, it does however appear to act LIKE a wave in many circumstances due to the uncertainty in the movement of elementary particles

I would assume that if the boat was that packed then rocking on waves would cause cargo to fall off?

Move it to the left side, it might be easier to replace it with a 'j' or some such since all you have left to do is some algebra and you don't get distracted by the integral sign

I haven't checked your wwork but at this point you just need to rearrange the equation so your integral only appears on the left, you're so close :-)

The E field for the right part of your semi circle is given by E = \int_0^{\frac{\pi}{2}} \frac{-Q}{4\pi\epsilon_0r^2} d\theta While the E field for the left part is the same but with +Q charge and integrated from \frac{\pi}{2} to \pi. Just add these two together to get the total field.

But the OP doesn't want to just know that it IS true, I'm sure (s)he already knows that, what they're after is an explanation on how it can be true, what makes it true; while a few lines of maths is the best way to show that something is true, it doesn't make a very convincing statement about...

As far as I know mathematics was born out of a desire to describe the world, with numbers often representing "lengths" of sticks, things like divisibility and common factors were imagined by which lengths of sticks could be used to measure others and so forth. So mathematics seems to have been...

I hate to break it to you guys but...

If you mean is there a B field in your reference frame then yes a compass would be messed up sitting in the center, but assuming that the radius of the ring is huge compared to you, you won't feel a magnetic force since your rotation doesn't really produce a velocity vector (again assuming you...

I agree the question is somewhat innapropriate, it's just what I think he was trying to ask us.

I think the OP is asking, not for a way to prove that levers supply a mechanical advantage, but for how the atoms in a lever interact so that the forces at one end are different to the forces at the other. i.e. what is the cause of mechanical advantage?

I like to think of it like this, take a wrench and grab it a distance d from the nut so that d << l where l is the length of the wrench. If you push down (or across depending on how you're picturing it) a very small amount then the wrench has been displaced by an angle \phi and the net...