Recent content by mrhingle

I assume the book used square root of 2's to make for easy transfer to RMS. I am given Peak, and plan to convert to RMS. To find the current I assumed clockwise around the mesh. Complex power = 1/2 VI*. Never considered direction of current when looking at it. Pretty new concept to me. So...

I'm looking at an AC circuit. There is a voltage source, a resistor, an inductor, then another voltage source. One loop. I am supposed to find the power in each element and tell weather it is absorbing or delivering. I think I remember that when a current goes into the negative terminal of a...

I see.. but when you use the laws to obtain angle B, why do I get 79.44? Makes me doubt the laws. When do you have to subtract the angle from 180. Is there a rule that makes since of this?

what does that mean? I thought this was a law? Do you have to use the same law for all angles?

the inverse is negative

nope

79.44

used the law of cosines. still got 29.44

Calculations: [itеx] v(a)^2 = 9^2 +4.5^2 - 2 * 4.5 * 9 cos (50) v(a) = 7.013 7.013/Sin(50) = 4.5/ Sin(alpha) alpha = 29.44 7.013/sin(50) = 9/sin(beta) beta = 79.44 [/itеx]

Calculations: [itеx] v(a)^2 = 9^2 +4.5^2 - 2 * 4.5 * 9 cos (50) v(a) = 7.013 7.013/Sin(50) = 4.5/ Sin(alpha) alpha = 29.44 7.013/sin(50) = 9/sin(beta) beta = 79.44 [/itеx]

I am given two sides of a triangle and the angle in/between them: 9 in/s and 4.5 in/s at 50 degrees. I am using the Law of cosines to get the third side which is 7.013 in/s. I then used the law of sine to find the two remaining angles. I have continually gotten 79.4 for one angle and 29.4...

if a 1 μq charge is placed between high and low charged equilateral plates, which way will it go?

What would happen if an air pressure increase from one sound wave were located at the same place and time as a pressure decrease from another of the same amplitude?

Work out in detail the situation in which a moving all collides with a stationary ball in a totally elastic collision. Assume the balls have the same mass when doing this calculation. How does conservation of momentum show itself in this situation? p = mv F = ma p1i + p2i = p1f +...

Suppose two of the same objects are separated by a compressed spring. The compression is released and the objects are directed away from one another at the same velocity. Add mass to one of the objects. What happens, why? I would guess the object with the larger mass moves slower and the...