Recent content by nvictor

1. Proving the cartesian product.

@SteveL27 it's the equality that i'm trying to prove. that |A X B| = |A| * |B|. @vrmuth i also don't know much about the successor function. it's just one of the requirement of http://en.wikipedia.org/wiki/Peano_axioms" [Broken] i will look more into that function and retry the proof.
2. Proving the cartesian product.

hello all, i'm trying to prove the cartesian product cardinality property of the cartesian product. on a first attempt i used this: and on a second attempt this: this is the first of many small exercises i'm doing for building a strong theoretical computer science background. i...
3. Direction of a particle in a uniform magnetic field.

thanks a lot for the reply.
4. Direction of a particle in a uniform magnetic field.

Homework Statement a beam of particles with velocity v^vector enters a region that has a uniform magnetic field B^vector in the +x direction. show that when the x component of the displacement of one of the particles is 2 * Pi * (m / qB) * vcos(theta), where theta is the angle between...
5. Conservation of mechanical energy

Thanks a lot, I see it clearly now. I really appreciate you help.
6. Conservation of mechanical energy

Homework Statement I have two blocks attached by a string (massless) over a pulley (frictionless, massless). Block 2 (which weighs less than block one) is released and the two blocks meet momentarily at the same height. I have the find the speed at which the meet at that moment. The blocks...

College :)
8. Incline plane + friction

vishal_garg, thank you so much :D I spent the whole night banging my head again my desk trying to figure out what I was doing wrong... Thanks for all replies
9. Incline plane + friction

Homework Statement In the figure (sorry for that quick drawing with paint) m_1 (first block) = 4.0kg, m_2 = 5.0kg and the coefficient of kinetic friction between the incline plane and the first block is \mu_k = 0.24. Incline = 30 degree with horizontal Find the magnitude of the...