1:52 AM
3

If I'm in outer space, initially at rest, and every single particle in my body accelerates at the same rate in the same direction, will I feel that? My brain is fried thinking about this. There are two possibilities: initially at rest and then accelerating with const acceleration w.r.t. some ine...

17 hours later…
6:46 PM
1

In beta decay neutrons convert into proton, in that process they'll release an electron (called beta particle) but mass still remains same $$_zX^A \longrightarrow\; _{z+1}Y^{A}+ e^-$$ The question is where did that beta particle came out from no where like matter can't be created or destroyed?...

2 hours later…
8:27 PM
1

The name itself suggests that we can hear acoustic branch of phonon modes (and not the optical branch), but other than that I do not see any reason whatsoever why we are able to hear them. In order to be completely clear, I define the acoustic phonons as the ones with the property that \$\omega \p...

3 hours later…
11:25 PM
1

A body travels from A to B at 40 m/s and from B to A at 60 m/s. Calculate the average speed. Can't we just add the given speeds and divide by 2 to get the average speed? This way answer would be 50 m/s In my book, however, they calculated total time taken and distance covered separately and the...