Recent content by willworkforfood

It is not defined on the axes :(

Defining the right circular cylinder, I have a vector formed between the centers of each 'cap' and a radius. I need to determine if a given point (x,y,z) is inside the confines of this cylinder. And and all help is appreciated.

The satellite is orbiting Earth in a fixed elliptical orbit. It must have 3D coordinates to account for whether a telescope on the Earth can see it (but not as part of these equations). The Earth is at/near one focus of this elliptical orbit. So I'm pretty much looking for something of this...

I don't know where to start

I'm not sure where to start on this one at all, very confused. I don't want anyone to do the entire problem for me just point me in the right direction. I know how to compute probability from simple random events but this question just confuses the heck out of me :( Question: A labor...

Thanks everybody

How can I use row operations for the n x n matrix when I don't know how many rows there will be? I don't understand how that yields a formula for the n x n case.

I miscopied the problem it would seem, it is actually a tridiagonal matrix rather than the one that previously appeared here. The picture above has been updated to reflect this. I again have no idea how to do this problem, any and all help is appreciated as before :)

Can anyone else verify if this method works and if so why? Thanks for your time, incredible.

I know what a determinant is and how to solve for it, but in the case of this n x n matrix on my homework, I'm at a complete loss as to how to even begin starting this. I don't expect anyone to work it out for me, just to give me a solid method for how to solve it and prove my method for the n...

The problem reads as follows: "The projection of a point P = (x,y,z) to a plane is a point on the plane that is closest to P. If the plane is defined by a point P0 = (x0,y0,z0) and a normal vector n=(x1,y1,z1), computer the projection of P on this plane." Well, I haven't had a relevant...

http://portfolio.iu.edu/whoblitz/problem.png I think Bernoulli's equation is involved in solving this problem, but past that I'm not sure what the pressure of the water inside would be or what it would be outside. Any advice appreciated, as always.

Because the force is parallel to the incline, the angle of the incline is not relevant to solving the problem. The mass of the crate likewise has nothing to do with solving the problem because you are given the magnitude of the force. Work in this case = F*d*cos(angle between the force and...

"A string is wound around a solid cylindrical spool of mass 9.4 kg and radius .11 m. Assume the acceleration of gravity to be 9.8 m/s^2. If the spool is released from rest and rolls along the string and the distance to the floor is 9.06 meters, then how long in seconds will it take the spool...

Still isn't helping, I keep drawing the free body diagrams and getting wrong and different answers. After solving for the torque forces (tensions) in that example, does it make a difference that the second torque is at an angle on an incline? What would the equation for the net torque even...