Recent content by greenskyy

Ah yes, that's what I meant, sorry :D . I was in a bit of a haste writing my reply, but my final answer did involve those variables - it was the constant I was focused on. Yeah, during my integration I factored out all the variables, which all ended up being multiplied by -sqrt(2). Actually...

Collinsmark, your post was everything that I had hoped for, and more. Thank you so much! It seems the classes I've gone to have focused so much on shortcuts that I never learned the correct way to go about these. Breaking the problem out into all of its components was time-consuming, but made...

Homework Statement Here is my beautiful drawing from mspaint. Using direct integration, find the electric field E at point P due to the line charges. Homework Equations E = ( k dq ) / r^2 \lambda=dq/dsThe Attempt at a Solution All I've been able to do up to this point is calculate the...

The force of gravity. I already took this into account with W being pointed down from the center of the circle.

Homework Statement A hollow cylinder of length L and radius R has a weight W. Two cords are wrapped in the same direction around the cylinder, one near each end. The cords are fixed to the ceiling. The cylinder is held horizontally with the cords vertical. The cylinder is then released. Find...

Homework Statement Dust particles are approximately 11.0 micrometers in diameter. They are pulverized rock, with density 2500 kg/m^3. If you treat dust as an ideal gas, what is the rms speed of a dust particle at 23.0 degrees C? Homework Equations I have no idea. The only one I would...

Yes, that's what you do. The mastering physics system has the incorrect answer stored as well, as if the number of moles were .1 rather than .01. The "true" answer should be to the magnitude of 10^24, while the one accepted by mastering physics is 10^25.

Thanks for the help everyone... =\ I figured it out after talking to some other students today. I was lacking one equation: (v_{x}^{2})_{avg}=\frac{v_{rms}^{2}}{3} Good luck on this problem for whoever needs this :D

Homework Statement A 10 cm * 10 cm * 10 cm box contains .01 mol of nitrogen at 20 degrees C. What is the rate of collisions (collisions/s) on one wall of the box? Homework Equations \frac{N_{coll}}{t}=\frac{NAv_{x}}{2V} v_{rms}=\sqrt{\frac{3k_{B}T}{m}}The Attempt at a Solution I'm really...

I had already drawn the FBD's. They really didn't help, as my issue was a result of something else. In my algebraic substitutions, I tried to get rid of angular acceleration as quickly as possible, when in reality that's what I should have solved for. Solving for \alpha first is much much...

Homework Statement http://img691.imageshack.us/img691/2702/drawing1.png A 1kg block is suspended from a rope that wraps around a pulley where it is pulled by a 10N force. The pulley is a disk with mass 50g and has a diameter of 4cm. Assume enough friction that the rope does not slip but...

Nope, I looked around and couldn't find it anywhere in the user control panel =\

Haha, well you make a theta using latex code. For the theta symbol, it would be [ t e x ] \ t h e t a [ \ t e x ] (minus the spaces)

Homework Statement http://img188.imageshack.us/img188/9897/73266226.png The problem is to create an equation to find the acceleration of the cart based upon theta. All that is given is the ball hanging is known as mass m. Homework Equations f=ma f=\frac{mv^{2}}{r} The Attempt at a...

Once the cart is released, there is acceleration. Plugging it into that equation would cause T to be smaller than if A was 0. The force of the weight of the mass is responsible for downward acceleration. How this is "distributed" does not make sense to me. It is a constant force regardless of...