Recent content by dukebdx12

Homework Statement I have the answer completed, but not using the matrix method. That is what I am confused on, I am unsure on how. Required to use matrix method. In figure, a real inverted image I of an object O is formed by a certain lens (not shown); the object-image separation is d =...

yea i realized it is in joules after looking again. At first I put in -.007 yesterday and now I put in -0.007 and it says: "Not quite. Check through your calculations; you may have made a rounding error or used the wrong number of significant figures." which 4 sig figures is right. so I am not...

yea...-0.007 was my first answer which was wrong also. edit...i think it is wrong because it is supposed to be in J.

On a frictionless horizontal air table, puck A (with mass 0.253 kg) is moving toward puck B (with mass 0.373 kg), which is initially at rest. After the collision, puck A has velocity 0.124 m/s to the left, and puck B has velocity 0.650 m/s to the right. Calculate DeltaK, the change in the...

Homework Statement In this device, an arm 8.84g long rotates about one end in a horizontal plane, and the astronaut is strapped in at the other end. Suppose that he is aligned along the arm with his head at the outermost end. The maximum sustained acceleration to which humans are subjected in...

i've got it all down now except the resolutions. I have tried searching for it on google and mathematica and i can't find anything on how to do it. It says. to draw surface and contour plots for resolutions. I don't know what that means? can someone explain?

ok thanks for the reply. my question is, it says make surface and contour plots for suitable intervals, viewpoints, and resolutions. For example f(x,y) = cos(xy) for -3pi <= x,y <= 3pi , that is 1 of the equations for the question. So to make surface and contour plots(many of them) do I just...

can someone help me out with a mathematica problem ( i use mathematica 6)? I have never used this program before and really don't know what to do or where to start. So if someone could give me a little light that would be great. http://i29.tinypic.com/25rkn5f.jpg -last graph is g(x,y)=

Homework Statement Rank from largest to smallest: 2i+7j-4k , 3i+j-k , 7i - 2j +4k , 4i + 7j - 3k Explain please Homework Equations The Attempt at a Solution Don't understand how and what to look for Homework Statement A receiver starts at +2i - 3j with the units being...