Recent content by bookerdewitt

Thanks a lot! This definitely helps clear up some misunderstandings I had.

Ok I think I understand now. Thanks.

So how do you know whether to divide or multiply by gamma? I thought that if you pick the stationary observers frame to measure the time in, you always multiply the time measured by the moving observer by gamma.

Ok, so the time that has passed between two events as measured by the stationary observer will always be larger

Ok sorry, suppose the train just travels there and is moving at constant velocity. Would the trip duration be longer for the observer at the platform?

So let's say there's a train and according to the passengers on the train the trip takes a time t to go from the station and back. According to an observer at the station, would they measure a time interval of gamma *t or t/gamma? I know they both should see the others clock ticking at a...

I did try that but I must have messed up somewhere... ill try it again

Homework Statement An object with mass m and an object with mass 3m collide in one dimension. The object with mass m is moving at 3 times the velocity of the object with mass 3m. What can you say about their velocities after the collision? Homework Equations m1vi1 + m2vi2 = m1vf1 + m2vf2...

Ok. That makes sense.

So mg=ffs would only hold if the block is just starting to move?

Lets say you have a block on a horizontal surface connected to a pulley and then a weight hanging over the edge. If its not moving then the force applied which is just the mass of the weight x gravity is equal to the force of static friction μsmblockg. So that means μs = the mass of the...

Thanks a lot.

No I havent. How would I even know what it looks like?

Homework Statement It is observed that a tube open at both ends exhibits harmonics at 438 Hz, 584 Hz, and 730 Hz. A) Calculate the fundamental overtone of the tube. B) Calculate the length of the tube. Homework Equations L=lambda/2 x n, v = f x lambda The Attempt at a...

Homework Statement Becky and Rajiv are standing at different points in a long tunnel while Naoimi adjusts her bass amplifier at one end. As Naoimi plays an 88Hz tone, BEcky cannot hear much and Raj complains that the volume is too loud. What is the minimum distance between Becky and Rajiv?(Use...