Recent content by chirumu

Homework Statement What is the maximum kinetic energy (in keV to 3 significant figures) of an electron emitted in the beta decay of a free neutron? Write down the decay equation using accepted notation. Mass of a Neutron: 1.008665 u Mass of a Proton: 1.007276 u Mass of an Electron...

thankyou for your reply :) ! i understand that gravity is acting downwards with the same force in both cases (and not horizontally), but that doesn't explain why the cartilage expands when the body is lying down if the force of gravity is exactly the same as when the body is standing. The...

Homework Statement i measured myself before going to sleep and after waking up over several nights and found out I'm ~1.5cm taller in the morning then at night. I know this question is related to human biology, but I'm equally (if not more so) interested in the physics behind the problem i.e...

Homework Statement I performed the following experiment in my backyard this afternoon. A 500ml can is filled with water and a ping pong ball floats on its surface. The can is dropped from a height of 1m onto pavement. The experiment is then repeated with the exception that the second time...

thankyou for your help :) i initially skipped this one and moved onto the others and after having done a few more its become more clear to me. in the end: log3(4)-2-2log3(6) given a^c=b and loga(b)=c to change 2 to base 3: log3(9) =2 so log3(4)-log3(9)-2log3(6)...

Homework Statement [PLAIN]http://img225.imageshack.us/img225/6162/unledsxy.png Homework Equations logb(x)-logb(y) = logb(x/y) logb(x^n) = nlogb(x) The Attempt at a Solution i am stuck on what to do because of the 4-2-2 portion. I've attempted it multiple times to get the...

Homework Statement Homework Equations - The Attempt at a Solution i understand that benzoate is derived from carboxylic acid (COOH) to which isopropyl has replaced the H, forming a benzoate substituent to which we derive the parent name of the structure. I understand that Chloro...