Recent content by snate

Thanks, your explanation hinted me why A0 is mg/3k. A0=amax/w2. And maximal acceleration amax after infinitesimal moment of time since the rightmost block has been released is gm/2m=g/2 because at that moment the spring is not deformed, so F=kΔx=k0=0, so we don't have to consider the spring...

Homework Statement 2 bricks of mass m are located near the edge of a smooth horizontal surface, they are connected by an ideal weightless ,unstretched spring with a length of l0 and spring constant k. The brick which is closer to the edge is connected to another brick of the same mass by an...

As far as I know radiowaves can't penetrate such kinds of metallic constructions because their wavelength is too long to "fit in the gaps". But I don't understand what does the wavelength have to do with being able to penetrate though these gaps or fitting into small spaces. Can someone explain...

In all the derivations of E2=p2c2+m2c4 ,that I've stumbled on, it's assumed that the rest mass energy is m*c2 just because kinetic energy is mc2λ-mc2. Was it originally assumed? If so, can someone explain me why is it a logical assumption? Are there any derivations without such assumptions?

I've been following the derivations in the following video up until that point. I don't quite understand why does it imply that μ*ε=1/c^2. Thanks.

Thanks you!

Can someone please explain what's going on at 47:40 Thanks in advance.