Recent content by eunhye732

Linear Algebra PLS HELP! I need help on this problem and been trying to figure it out for awhile. Let A be an m x n matrix with linearly independent columns. Show that A^TA is invertible. anything will help. Thanks

if this was a wrong place to put my question, can you tell me where? Thanks

C++ using For statement This is my first time using a C++ program...actually any programs. my C++ programming class is a lot harder than my physics and math classes. =( i've never struggled so much so i would REALLY REALLY appreciate as much help as possible. here is my problem: Write a...

Oh i see how to do it now. That helped a lot. Thanks so much!

I have been trying to figure this out but can't. I even went to the tutorial but the lady kept mumbling so it was obvious that she didn't really know how to do it either. So I really hope someone could help me. The only thing he told me was to look at the pythagorem theorem. Thanks

Find the parametric representation for the surface: The part of the sphere x^2 + y^2 + z^2 = 16 that lies between the planes z = -2 and z = 2. okay, i know that i have to use spherical coordinates which is x = 4sin(phi)cos(theta) y = 4sin(phi)sin(phi) z = 4cos(phi) i know how to find...

The center-to-center distance between Earth and Moon is 384400 km. The Moon completes an orbit in 27.3 days. (b) If gravity were switched off, the Moon would move along a straight line tangent to its orbit, as described by Newton's first law. In its actual orbit in 1.00 s, how far does the Moon...

I am doing a physics lab and i have no idea what exactly i have to do. I have no time to go to the tutorial and i even read the book. I am doing a lab based on moment of inertia. The problem i am having is that i have to derive an expression for the rotational inertia of the rotating cross...

What i seem to get was the same thing as you...but i got a little confused with your writing so hopefully we are saying the same thing: so yes, v1f (final velocity of mass 1) = [(m1-m2)/(m1+m2)]*v1i then to find the max height, m1ghmax = (1/2)m1v1f^2 so, you can see that m1 cancels...

well, my teacher told me that it's suposed to be a numberical answer. Thanks anyways

The Earth rotates about its axis with a period of 24.0 h. Imagine that the rotational speed can be increased. If an object at the equator is to have zero apparent weight, (a) what must the new period be? (b) by what factor would the speed of the object be increased when the planet is rotating...