Recent content by Prodigium

so t_2= \frac{x}{c} \cdot (1- \epsilon )^{-1} = \frac{x}{c} \cdot (1) or, because that completely gets rid of \epsilon :- t_2= \frac{x}{c} \cdot (1- \epsilon )^{-1} = \frac{x}{c} \cdot (1+ \epsilon ) That after finding \Delta t gave me and answer of -1.55 \cdot 10^{-12} s only...

\Delta t = \frac{(1- \epsilon )x-x}{c (1- \epsilon) } after putting t_1 = \frac{x}{c} and t_2 = \frac{x}{c(1- \epsilon )} , then to find \Delta t = t_1 - t_2 but I can't seem to get it , did I do this correctly?

Relativity question, photon and proton... Homework Statement Proton of gamma factor 10^12 and a photon set off from one side of our galaxy to the other take the distance to be 9.3x10^20m. What is the time interval that the photon precedes the proton?Homework Equations \gamma =...

Thanks so much i have a consistant answer now :D and i am more confident with circuits.

Okay so I got (using kirchhoffs lecturer says we have to use kirchhoffs laws) outer loop :- 24-3I-7I2=0 left hand loop :- 24+ε-3I-2I1=0 right hand loop:- -ε+2I1-7I2=0 i went on to solve and didnt get a consisted answer...

Homework Statement What must the emf ε in the figure be in order for the current through the 7Ω resistor to be 1.79A ? Each emf source has negligible internal resistance. Homework Equations V=IR Kirchoffs junc and loop rules The Attempt at a Solution I put that the outer...

could you give me a hint for the kinetic because I am completley stuck and have been for a while. thanks

Thanks for the welcome, so far from what I've seen it's a brilliant site.

Ah so because the force is acting on the coin not the trolley it's "m" instead of "M" and therefore cancels. Thanks now to attempt the kinetic coef.

Homework Statement A rocket Propelled Trolly begins at rest time t = 0s, and then accelerates along a straight track such that the speed at time t is v(t)=bt^{2} where b is a constant, during the period 0<t<t2. at time t_{2}, the rocket fuel is exhausted and the trolley continues with...