# Recent content by iurod

1. ### Electric Field and Electric Potential Question

oh, I totally skipped that: it would be Magnitude 5.1x10^6 N/C to the south east (45 degrees below the positive x-axis? Thank you for your help!
2. ### Electric Field and Electric Potential Question

Anyone???????
3. ### Relativity Question

now this makes total sense. Since I have no length in either frame I cannot use the Length contraction equation. The 10 years I plugged into the length contraction equation is not a length but a time... Thank you for helping me with this Vela. I greatly appreciate it...
4. ### Relativity Question

If I use d=vt I get: d=0.80c(10years) = 8 Lightyears for the people on earth and d=0.80(6years) = 4.8 Lightyears for the astronauts I was under the impression that d=vt was not valid for speeds close to the speed of light? (I'm a little confused was finding the distance via the...
5. ### Electric Field and Electric Potential Question

Homework Statement You have a Square with 10cm lengths on each side. Charges of +4 microC (top right corner), -6 microC (top left corner), and +4 microC (bottom left corner) are located at three corners of the square. A) Calculate the electric field in the empty corner of the square. B)...
6. ### Relativity Question

The only formula I thought fit after doing multiple relativity questions was Length contraction for a question like this. Is there another way to solve it? I tried time dilation first thinking time/years seems reasonable, but my answers were wacky. But it may have been a mathematical error...
7. ### Light after a Polarizer Question

Homework Statement Initially unpolarized light with an intensity of 240W/m2 is incident on a series of two polarizers. What should be the angle between to the axes of the two polarizers such that the transmitted intensity after the second polarizer is 37.5% of the incident one? Homework...
8. ### Relativity Question

Distance on earth inertial frame = 0.80c(10years) = 8yc (does yc = light years?) Distance on spaceships inertial frame 0.80c(6years) = 4.8yc Thanks... does all the other stuff look correct? Thanks for your help
9. ### Relativity Question

Homework Statement A) at what velocity will be the KE of a spaceship 2/3 of its rest energy? B) If the Spaceship travels at this velocity relative to the earth and its trip takes 10 years as measured in the earthbound system, how much time has elapsed on the spaceship clock? C) What is the...
10. ### Double Slit Interference Question

Thanks! Definitely a typo, sorry about that.
11. ### Double Slit Interference Question

Homework Statement Light of wavelength 680 nm falls on two slits and produces an interference pattern in which thefourth-order fringe is 38 mm from the central fringe on a screen 2.0 m away. What is the separationof the two slits? Homework Equations Sintheta=2m(\lambda2d)...
12. ### Lens Combination Question.

The object distance is defined as the distance between the object and the lens. for the first lens i got an image distance of 125cm. This goes beyond the second lens so to consider the first image as the second object wouldn't i have to subtract the distance in between the two lens and the...
13. ### Converging Lens Problem

Any more advice on this? Thanks!
14. ### Lens Combination Question.

Homework Statement Two 28.0-cm-focal-length converging lenses are placed 16.5 cm apart. An object is placed 36.0 cm in front of one lens. Where will the final image be formed by the second lens? Homework Equations 1/do + 1/di = 1/f The Attempt at a Solution for the first...
15. ### Converging Lens Problem

A real image is inverted and m should be negative m= -di/do -2= -di/do do= -di/-2 If this is correct then 1/do+ 1/di = 1/f -2/-di + 1/di = 1/f hmmm I'm stuck after this