Recent content by chrisdapos

Hi, I was watching Through the Wormhole two weeks ago (I think it was a re-run), and they were talking about the uncertainty principle, and how it was impossible to prove due to the change in momentum of a particle when hit with an observation device, such as light. I think the guy was using...

Homework Statement Is it possible for friction to act in the same direction as the motion of an object? If so, are there any real world examples? Thank you! The Attempt at a Solution I don't know where to start...

A and B tell you the distance from the center of the ellipse to make a point. A tells you how far in the vertical direction (up and down) to move, and B tells horizontal direction to move (left and right). I don't understand this however because there are no A and B, unless both are 1. I don't...

A circle with radius 1. So does this mean I get an ellipse, centered at the origin with a=2 and b=3?

Homework Statement Graph 4x^2 + 9y^2=1 The Attempt at a Solution I have no idea where to start. There is nothing to divide out by, and there are no A or B terms. Any assistance is greatly appriciated! Thanks, Chris

Linear Algebra - System of 2 Equations with 3 Variables--possible? Homework Statement Solve: x1-3x2+4x3=-4 3x1-7x2+7x3=-8 -4x1+6x2-x3=7 The Attempt at a Solution I was able to make it to: 1 -3 4 -4 0 -10 25 -11 0 0...

The question reads exactly, if the radius were tripled, what would happen to the centripetal force? The preceeding question is describe the relationship between Centripetal Force and: v, v^2, T and M. I don't think the preceeding question holds any context though. Thank you for your help!

Hello, I know that there are two possible formulas to solve for radius. You can use (mv^2)/r ,or, (m4pir^2)/T^2. Now, the question is asking when the radius is trippled, the centripetal force is...? Using the first equation, I come out with 1/3. Using the second equation, I come out with 9...

Thank you so much guys! Wow i feel dumb...turns out i was just plugging the functions in wrong. Thank you so much!

my problem is when i simplify, i get 0 over 0...i don't know why...i can't get the h to go away in the denominator

Hello, today my teacher presented us with the concept of derivatives. I was okay in class, but when I got home, I was completely lost. Using the definition (f(x+h) - f(x))/h, we have to fine the derivative of y=2x^2 - 5. I know the answer is 4x from the back of the book, but I can't understand...

thank you!

Hello! I just was wondering how to enter [x]/x into my calculator to get a graph. When I try, I get a syntax error. Thank you for your help! BTW: I have a TI-84 plus!

The percent errors work out if I do KE/PE times 100, and they make sense. I don't know why my teacher had as calculate KE from exit velocity either, because that is a new system...it doesn't really matter tho, thanks for all of your help! The initial question was What is the percent PE to KE...

The question is: State the percent PE to KE. I thought PE would get divided by KE? Am I wrong here?