Recent content by alfredo24pr

Ok, I figured out the middle ones and you explained the last one. How do I start with the first question: "What potential difference must be applied to the external terminals?"

Homework Statement http://i1103.photobucket.com/albums/g480/Alfredo24PR/physicssucks.jpg" Homework Equations V=IR The Attempt at a Solution I tried adding the resistance: 1/8 + 1/ (6+5+10) = 1/8 + 1/21 = 0.1726 1/0.1726 = 5.793 ohm

Yes. Lightbulb D

Homework Statement Attached in picture Homework Equations N/A The Attempt at a Solution for What will happen if you cut the wire at position B? I think The light bulb will become dimmer, but not go off. Am I correct? for What will happen if you cut the wire at position D...

Homework Statement There are 4 identical metal balls: J, K, L, M. Initially, J has charge QJi = 0e, L has charge QLi = +42e, and M has charge QMi = -48e. The ball J touches the ball K, and they separate. Then, the ball J touches the ball L, and they separate. Then, the ball J touches the...

It is not a problem, but I need to fill a table of animals and there is a section that says appendix. How do I fill it in? Is it a yes or no question?

uhh.. m1v1 = m1(2.3) m2v2 = m2(2.3) 1/2mvi2 = 1/2m(2.3)2 and then i substitute m1(2.3) + m2(2.3) = m1vif + m2vif 1/2mvi2 + 0 = 1/2mvf2??

so m2 / m1 is negligible therefore I can write it out as 0? I still do not understand how to work with both equations.

m1v1i + m2v2i = m1v1f + m2v2f and 1/2mvi2 + mghi = 1/2mvf2 + mghf

umm.. I do not understand. I know that I have to relate to v used in momentum to the v in kinetic energy :confused:

hi tiny tim..so that means I have to relate kinetic energy?

Homework Statement A ball and bat, approach one another each with the same speed of 2.30 m/s, collide. Find the speed of the ball after the collision. (Assume the mass of the bat is much much larger than the mass of the ball and that this is an elastic collision with no rotational motion)...

mg cos 30.3?

The professor told me that it is the same coefficient for both

I cannot get an answer. How do I use friction?