Recent content by Epif

Ahh that makes sense and gives e the right answer. Thanks!

Homework Statement http://img340.imageshack.us/img340/3249/question.jpg Homework Equations P=h/lambda E=p^2/2m The Attempt at a Solution Well, I calculated P using a wavelength of .1 femtometer. Then I plugged it into the energy equation. However, I got 1.5e14 eV, while the...

Homework Statement What is the de Broglie wavelength of a 10 microKelvin Rb atom? A 5000K electron? Homework Equations \lambda=\frac{h}{p} V=\sqrt{\frac{3KT}{m}} The Attempt at a Solution I used the velocity equation to find the velocity relating to temperature and mass. Then, as...

Homework Statement http://img517.imageshack.us/img517/8112/neutrinosll8.jpg Homework Equations The Attempt at a Solution I was able to express the time delay as D(1-\frac{1}{1-\delta}). However, I don't have a lot of experience using Taylor series and did not use one to obtain...

Homework Statement http://img151.imageshack.us/img151/6641/torquebk4.jpg Homework Equations T=F*r F*X=Ia I=ML2/3 The Attempt at a Solution I was able to do part A easily enough, but I'm not quite sure where to even start with part B. I know that the force on the pivot point...

Homework Statement A quarterback throws the football to a stationary reciever who is 40.0m down the field. If the football is thrown at an initial angle of 37.0 degrees to the ground, a. What is the initial speed of the ball? b. How much time does it take for the ball to reach the reciever...