Could someone give me a hint on the first part of this? Because I can derive it - that is just simple trigonometry - but I can't figure out how to concretely prove that \hat{r}= \hat{x}cosθ + \hat{y}sinθ
Edit: I'm thinking illustrate that \vec{r} = r\hat{r} in polar and then showing that in...
what difference does that make? It's just a label? What do you mean by "counting", though? Perhaps that's why I'm wrong. I just thought I needed to do the first bit and second bit for A (so 2^1 and 2^0 since base 2), the first bit for B (2^0), and then first and second bits for C (2^1 and 2^0)
Homework Statement
What is the truth table for a 2 bit number multiplied by a 1 bit number? Also, draw the circuit (AKA, the logic gates that give you the truth table).
Homework Equations
Not really any relavent equations...
The Attempt at a Solution
so I made the truth table, it...
Reviving an old topic here, but shouldn't it be N*M bits? Because a one bit wide times a one bit wide can be represented with a one bit output, and a 2 bit times a one bit is represented by a 2 bit output (you only need two bits to represent "3")?
That makes a lot of sense. Thank you.
It doesn't need to be two resistors though, does it? It can be a resistor and inductor, or resistor, can't it? And what if a resistor or inductor (pure) came first. They don't have any real resistance (it's imaginary), and don't dissipate power, so would...
How does one tell if a circuit is a voltage divider or not, without working out the circuit? Because in class people just look at the circuit and say "well that's a voltage divider so..." and then procede to solve the problem.
So, how does one tell if a circuit is a voltage divider just by...
Yeah, I confused myself and I got it all sorted out. It wasn't the drawing that confused me though, I'm alright with circuit diagrams. It was looking at the actual circuit that confused me because by thinking in terms of cw and ccw it appeared to me like the currents would be opposing, but...
i never said that they go in a different direction then negative to postitive. I'm saying if one loop from the negative to positive terminal is clockwise, and the other is counterclockwise, would you have electrons going clockwise and electrons going counterclockwise? They are still going...
Well that's why I figure postive terminal to negative terminal counts as one direction, but what if there are two paths to get there, one of which is clockwise, the other counterclockwise.
I have attached two pictures, one of what the setup would be like, and one of the circuit diagram. I...
Ill get a picture up. It mist likely won't be a proper wiring diagram, not the actually apparatus (since I currently don't have resistors or a battery or wire or anything of the like, but ill get a picture up nonetheless. Just wait a few minutes
EDIT: apparently I can't upload a picture...
I'm just wondering if current can go in two opposite directions. To clarify, I'm thinking about a simple circuit. Say you construct a circuit with two loops, both of which original from the same terminal of a battery, on loop which goes to the left and the other which goes to the right, and then...
Can anyone brief of on the different rules for doing ray tracing for both concave and convex lenses, as well as both concave and convex mirrors?? I understand the concepts but i can't seem to keep ray tracing in my head from the way our textbook explains it...