Recent content by emilypearson

So I guess for first year university physics I'm ok just to write 'beta plus and/or electron capture' and hope for the best in the exam next week! Thanks very much for your help.

Thanks, but is there any way of predicting which is more likely? For example Ce-137 (Z=58) decays by positron decay (according to a search engine). How would you know it is beta plus not electron capture? Or is there no way of working it out (via masses etc)?

So my question has a few parts to it. First, if an atom is decaying and the proton (Z) number is decreasing in the decay process, am I correct in assuming that the nucleus is either decaying by electron capture of beta plus emission? Secondly, I understand that beta plus emission can only...

Perfect - thanks :)

That's what I attempted to do with the Pf-Pi with P being momentum (mv) ... is that not the right equation?

Homework Statement A ceramic pot of mass 0.5 kg will break if it strikes the floor with an impact force equal to, or greater than, 20 N. The collision lasts for 0.05 s. Find the minimum vertical height from which, if dropped from rest, the pot will break upon impact with the floor (you...

Homework Statement A large vertical cylindrical rainwater collection tank of cross sectional area A is filled to a depth h. The top of the tank is open and in the centre of the bottom of the tank is a small hole of cross sectional area B (B<<A). Derive expressions for (i) the flow speed...