Recent content by C. Long

I can understand how the image distance can be positive or negative, I just don't see any instance when the object distance would be considered negative and you still get any kind of image. If the physical object is on one side of the mirror and the incident rays are coming from the other, then...

Thanks. It still looks like there wouldn't be any way the light could create an image if they are on opposite sides of a mirror.

We are finishing up light and I'm a little confused on when the object distance would be negative when we are talking about mirrors and not lenses. The definition we were given is that the object distance is negative if the incoming light is on the opposite side of the mirror then the object is...

Hey thanks guys I think I understand this now.

Alright I think I see. I'm a little confused on the direction across batteries and resistors in terms of if the term is positive or negative. Our professor seems to flip flop; sometimes if the current is going neg to pos across the battery it's a positive voltage and other times it's a negative...

You get currents from the voltage law and voltages from the current law?

Specifically the equations you get when you examine the loops in a circuit.

I see what you are saying, I should have thought of that myself. I'll check to see if that's what it was.

That would be the same then for Kinetic Energy as well?

I have a very simply Physics question. When talking about the change in Potential Energy it is the Final value minus the initial value correct? That's the way we were taught the Work Energy Thereom but some of the online homework now seems to be subtracting the Final value from the Initial. Am I...