Recent content by uselesslemma

Ah yes I see. So ##\hat r=cos\phi \hat x + sin\phi \hat y##, and it is therefore not exempt from integration. ##\overrightarrow{F}_{m}=\frac{\mu_{0}I_{1}I_{2}R}{2\pi}(\int_0^{2\pi} \frac{cos\phi d\phi}{R sin\phi +D}\hat x + \int_0^{2\pi} \frac{sin\phi d\phi}{R sin\phi +D}\hat y)## In this case...

Homework Statement A long straight wire carrying a constant current I1 and a circular wire loop carrying a constant current I2 lie in a plane. The radius of the loop is R, and its center is located at distance D from the straight wire. What is the magnetic force exerted on the loop by the...

To be specific, I am referring to CO molecules undergoing collisions with H2, resulting in CO transitioning to an excited vibrational state. I can't seem to find any rotational selection rules for collisions, meaning ΔJ could be essentially anything, as long as energy and angular/linear momentum...

Challenge #1 is my main issue personally. Not comparing yourself to others is difficult, but once you decide to ignore the progress of others learning becomes much easier, and you'll find yourself leagues ahead! Nice article.

Check the correctness of this equation by comparing to the one you provided for linear expansion. V should not cancel algebraically...otherwise how would you find ρ?

Then what is your question?

Did you try expressing the volume expansion formula in terms of ρ instead of V? You should find a result that is independent of the object's mass.

This is a volume mass density, which should have units of mass / volume. The expansion of the object is not restricted to one dimension. This is not true. Any change in dimensions will be accompanied by a change in density. Why is this? Is the object's mass changing? How are density and volume...

I think you need a refresher on the right hand rule. You may find the first sentence useful. http://en.wikipedia.org/wiki/Right-hand_rule The right-hand rule is defined for use in 3D coordinates. Furthermore, you should generally begin any physics problem by defining a convenient set of...