Recent content by csinger1

That was so simple! Thanks!

Homework Statement Calculate the size of the quantum involved in the excitation of a molecular vibration of period 20 fs. Express the results in joules and kilojoules per mole. Homework Equations ΔE = h/t The Attempt at a Solution I converted fs to seconds and used the above equation to...

Homework Statement A new experiment is created with the screen at a distance of 2.2 m from the slits (with spacing 0.12 mm). What is the distance between the second order bright fringe of light with l = 683 nm and the third order bright fringe of light with l = 400 nm? (Give the absolute value...

That's a relief! I spent a loooonnnggg time working this problem. Thanks!

Substitution method with Integration by Parts? Homework Statement Evaluate the integral... ∫x^3[e^(-x^2)]dx Homework Equations ∫udv=uv-∫vdu The Attempt at a Solution I first tried using integration by parts setting u and dv equal to anything and everything. This seemed to make...

Thanks for the help! Still working out the details but it is good to know I'm on the right track.

Ok, so T1x=T1*cos40? The problem with this is that I end up with 2 variables and I'm not sure how to solve for either one of them with the given info. It seems like the 32.34 should be worked in somewhere but being that it's the sum of T2y and T1y, I'm not sure how to apply it.

In the x direction I came up with T2x-T1x=0 In the y direction I came up with T2y+T1y=mg I found mg=32.34 Not sure where to go from here though.

Homework Statement A block of mass 3.3 kg is suspended by two ropes as shown in the picture below. The angle that the left rope makes with the horizontal is q= 40 degrees. The angle that the right rope makes with the horizontal is q= 30 degrees. What is the tension in the left rope...