Recent content by Aeighme

Please help! This concept is confusing for me and once I understand this, it will make the rest of my problems much easier to solve.

Homework Statement A radium isotope decays to a radon isotope by emitting an α particle (a helium nucleus) according to the decay scheme 226Ra --> 222Rn + 4He. The masses of the atoms are 226.0254 u (226Ra), 222.0176 u (222Rn), and 4.0026 u (4He). What is the total kinetic energy of the decay...

now I multiply that by 1/gamma or (1-Beta2).5 and beta = .42... so L=3.8238

So only the x component...is contracted. so L*cos(66.1)=L(x)?

Homework Statement A rod of rest length L0 = 10.4 m moves with a speed v = 0.42c along the x axis. The rod makes an angle of q0 = 66.1° with respect to the x' axis (primed frame is moving with the rod). What is the length of the rod as measured by a stationary observer? Homework Equations...

Alrighty. I got the right answer. Thank you again. This stuff is mind bending >.<

u=(u1+v)/(1+(u1/c2)) with u being the velocity I'm attempting to find, v being that of train and u1 their speed wrt train?

As measured on the ground, how far apart are the two points at which the pair hit the groundFor this next part, I now use the velocity wrt the ground..which would be .1c?

oh, got it. Just double d..and it works. Thank you!

and then I double that answer to find the distance between batman and robin? or do I find robin's distance a different way?

19.3e-9*(1-(.74)2)-.5=t t=2.86943e-8 s d=vt d=.74*3e8*2.86943e-8=6.37m ?

Ohhh. so if I use .74 instead, I should get the correct answer.

.74c -.64c

19.3e-9s * (1/(1-.12)1/2= t Then... d=vt with v of joker wrt batman and time from above.

Homework Statement Holy Time Dilation! The Joker has captured Batman and Robin and has superglued them together to the roof of a train, which is moving at a steady velocity of magnitude v = 0.64c toward a low bridge. Confident that his diabolical plan will finish off the dynamic duo for...