Recent content by goomer

Oh wow, I can't believe I missed that...thank you so much!

Please look at the third circuit diagram from the link below http://www.allaboutcircuits.com/vol_1/chpt_2/7.html It says that there should be 10V between every point in the diagram. But shouldn't there be a difference in voltage value between points 1 and 2 and points 3 and 4? There's a...

Got it, thanks guys :)

I see...so when the circuit is broken, you can think of the two individual sections of wires as extensions of the battery? Also, is there no flow because nothing is going through the wire at all, or is it because there is an electron build up in the wire?

I'm reading a tutorial about the basics of circuits and I don't understand this concept. In the three last circuit diagrams in the link located below, there is a break in each of the circuits. The ends of the breaking points are labeled + and -, but how can that be? My thoughts: If there...

Say you have a capped water bottle and you drop it so the cap hits the ground and then the bottle falls over. Would the force with which the bottle FALLS OVER (not when the cap hits the ground) and hits the ground be the same as if you balanced the bottle on its cap on the floor and then pushed...

Thank you so much for your help!

Oh I see, so: Force = Momentum/Time Momentum = Mass * Velocity = 0.5 kg * 14 m/s = 7 Force = 7/0.18 s = 38.9N right?

Homework Statement If a soccer ball of mass 0.5 kg is kicked with a speed of 14 m/s and hits a rock and is in contact with it for 0.18 seconds, with what force will it hit?Homework Equations Fnet = ma The Attempt at a Solution I have no idea what to do to get the acceleration for the above...

Oh sorry! C should be "Parallel to vxB". I assume is C is the right answer then? If so, why?

Homework Statement A charged particle traveling with a velocity v in a magnetic field B experiences a force F that must be: A. parallel to v B. perpendicular to only v C. parallel to v-B D. parallel to B E. perpendicular to v x B Homework Equations Requires this right hand...

I'm having a hard time understanding subspaces and subsets in linear algebra. So what I'm getting is that a subset is any set of vectors in a plane R^n. So a subspace is a set of vectors in a subspace? http://postimage.org/image/6e2tl1c51/ http://postimage.org/image/6e2tl1c51/ ^This is my...

velocity/time = acceleration

I don't understand when acceleration is constant and when it changes. What are some examples of situations where the acceleration is constant and when it's not? Is acceleration constant when a disk is rolling down a ramp?

Say a person is pushing a box. The box starts at rest but eventually moves because the person's act of pushing on the box overcomes the friction between the box and the ground. Is the force of friction decreased after the person overcame the initial friction? Does the coefficient of friction...