Recent content by lozah

Yup I just got it right before I got the notification that you replied! It should be 65 degrees because that is the change in angle from 25 degrees to 90 degrees (in order to accommodate the fact that the outer two polarizers have their transmission axes crossed). THANKS!

Homework Statement Two polarizing sheets have their transmission axes crossed so that no light gets through. A third sheet is inserted between the first two such that its transmission axis makes an angle θ with that of the first sheet. Unpolarized light of intensity I0 is incident on the first...

Homework Statement A 0.50 kg ball with a speed of 1.5 m/s in the positive direction has a head-on elastic collision with a stationary 0.80 kg ball. What are the velocities of the balls after the collision? Homework Equations I've used the Ek = (1/2)m(v^2) so far. The Attempt at a...

OH! Maybe I figured it out. Since doubling velocity QUADRUPLES the stopping distance (because 2^2 = 4), and the velocity was increased by 1.8, I can square 1.8 (1.8^2 = 3.24) and multiply 3.24 by 70.0 to get 226.8! Does anyone know how I could show this in a more mathematical way?

Homework Statement A car traveling at 50.0 km/h stops in 70.0 m. What is the stopping distance if the car's speed is 90 km/h? Homework Equations This is a question in the unit about momentum & energy, so most of the questions have been applying formulae about momentum, work...