Recent content by hy23

this is so confusing, isn't 1 and 2 saying the same thing, and 3 and 4 also saying the same thing

ok i did the calculations and i said that the the explosion happens at t=0 in the train passenger's frame, using Lorentz transformations I found that from the outside reference frame, the light from explosion reaches the back of the train at a t'<0, and reaches the front at t'>0...(you probably...

Homework Statement There's a train traveling at 0.5c when a light at the center of the train flashes. When the light reaches the front, it rings a bell. Light reaching the back rings a siren. Question is: are the bell and siren simultaneous events for a train passenger? are the bell and...

Evo, I live in Canada. I'm thinking that without the data, I can still use the wifi, I'm not sure whether i can still use the BBM though. And atomicjoe, I see you already have a PhD in wearing the troll hat

Hey guys, I don't know much about the new smartphones and all the data plans, for years I've just used a shabby prepaid phone, but now I'm kind of interested in the Blackberry Bold. I know that if I get it in stores, it will be around 50 dollars with a 3 year 60 dollar/month data plan contract...

Thanks for your reply. I understand the equations of motion but the solution seems to be beyond my level. Is there a way to solve it numerically? Preferably some simple method.

Hello all, I'm currently an undergrad in my first year doing an experiment with the brachistochrone and I wish to model it mathematically and introduce friction into my model. I understand that the original brachistochrone was solved using the action principle and seems to require Lagrangian...

vk makes a good point though, I don't see anything going wrong with starting the clock mechanically, but for the impact that will operate the switch at the end of the track, I'm afraid that the marbles which are less that 1cm in diameter won't create enough impact, and even setting up additional...

Why do non Newtonian fluids such as the cornstarch and water mixture respond to stress the way they do? What prompts the atoms to come together to resist the force?

I will definitely try to use something like gates and pulse generators...they are quite pricey though. Regarding the brachistochrone, with rolling friction the solution will still be something close to the inverted cycloid right?

I'm conducting an experiment to determine the brachistochrone. The setup is going to involve an inverted cycloid shaped track about 5 or 6 feet long. I need a way to measure the time it takes for a marble to roll down the track and I need a more accurate method than manually operating a...

Homework Statement A uniformly charged ball of radius a and charge -Q is at the center of a hollow metal shell with inner raduis b and outer radius c. \The hollow sphere has net charge +2Q. Determine the Electric Field Strength at r when r is, r < a a < r < b b< r < c r > c...

If we were to measure the speed of light as the scientists in the 1800s did (such as Foucault and Fizeau), without knowing the relationship between speed of light and its wavelength and frequency, would it be possible to do so using only simple apparatuses like mirrors and low powered motors and...

Holy cow. Thanks

After reading about the Riemann Zeta Function on Wolfram Alpha (http://mathworld.wolfram.com/RiemannZetaFunction.html), it's still unclear to me how the Euler product formula is essentially equal to the limit of a p-series. Someone please enlighten me