# Search results

1. ### Angle between colors - dispersion

Here is what i'm doing! Yellow: 1.492sin(30) = 1.000293sinθ Green: 1.493sin(30) = 1.000293sinθ When I do the calculations i am not getting the correct. The answer is suppose to be 0.043 degrees and 1.33 m. Where do you think I am messing up the calculations?
2. ### Angle between colors - dispersion

(a) A narrow beam of light containing yellow (660nm) and green (550nm) wavelengths goes from polystyrene to air, striking the surface at a 30 degree incident angle. What is the angle between the colors when they emerge? (b) How far would they have to travel to be separated by 1.00 mm? I need...
3. ### Simple Harmonic Motion of skydiver

I'm getting an answer of 2.5, is that correct? The correct answer is 1.94 s, or thats what the book says.
4. ### Simple Harmonic Motion of skydiver

I'm not sure that is the correct number i got for K, i have so many numbers on my paper everything is mixed together. I took the period given which was 1.5 divided by 2 pie 1.5/2pie = .239. Then i squared to get rid of the square root. Which gave me .239 = m/k. Then multiplied by k and divided.
5. ### Simple Harmonic Motion of skydiver

I got k = 38.14 I don't know if its right though
6. ### Simple Harmonic Motion of skydiver

I can't seem to get the right answer, where is my mistake? A 90 kg skydiver hanging from a parachute bounces up and down with a period of 1.5 seconds. What is the new period of oscillation when a second skydiver, whose mass is 60 kg, hangs from the legs of the first? I am using the...
7. ### EMF and Terminal Voltage

Thanks for the help, its greatly appreciated!!
8. ### EMF and Terminal Voltage

Is this what you mean.....I1 - I2 would be negative, causing a +2/5...right?
9. ### EMF and Terminal Voltage

Lets see if i understand: -2 V = 5r......r = -2/5??
10. ### EMF and Terminal Voltage

The E's would cancel each other out? But it seems to me there are more variables than numbers for this problem.
11. ### EMF and Terminal Voltage

I'm sorry, but I guess I am not understanding about how I get the information from the graph. Since E and r are unknown constants; does that mean that I could leave them out of the equation and just have V = I? Or am i making it harder than it really is? Is this close? 2V = E - (5 A)r
12. ### EMF and Terminal Voltage

I know that the internal resistance of a voltage source affects the output voltage when a current flows. I was thinking that I would use the equation V = E - Ir...but I seem to get a different answer each time I use it. I also know that V = IR. Im my view of this problem I do not have enough...
13. ### EMF and Terminal Voltage

Hello everyone! I have a question and any help would be appreciated! (a) What is the internal resistance of a voltage source if its terminal voltage drops by 2.00 V when the current supplied increases by 5.00 A? (b) Can the emf of the voltage source be found with the information supplied?