Recent content by Vincit

It's the summer holidays and I have no textbooks including any of this stuff! Wikipedia is too convoluted for me.. Why shouldn't I consult a forum? If I'm correct, this is a physics forums, here to offer help and answer questions. If that's not what it is for, then sorry.

I've tried but cannot find any solutions at all.

yup, I just worked it out in the previous post. Help me with the rest :)

so 1080-120=960 960/2=480 /2=240 2 x halflife =12 hours halflife= 12/2 halflife= 6 hours.. so how is it 4? EDIT: forgot to subtract from 240! 960/2=480 /2=240 /2=120 so 3 x halflife= 12 hours halflife= 12/3 halflife= 4 hours! Thank you, now the rest!

how would i do that?

So my teacher entered me for the Physics Challenge for GCSE students(test from the makers of the Physics Olympiad, for gifted students), which is intended for students of 16 years of age; year 11. I'm 15, and I'm in year 10, so i don't know why my teacher entered me.. Anyway, I have to...

2 metals do NOT make a covalent bond; they make a metallic bond. Covalent bonds are between two non-metal elements, and ionic bonds are between non-metal and metal elements. If you delve further, you will also find out that noble gases make ionic compounds. Arsenic(III) Iodide would be a...

'Glory is fleeting, but obscurity is forever.'

'Glory is fleeting, but obscurity is forever.'

"Reverse Universe": In general, we could say that looking to the ultimate particles of matter, enough physical laws subsist in the reverse universe to determine, from the positions and velocities of all particles of matter at a given instant, the entire past and future of the universe. The...

Reverse Universe. Among the physical laws it is a general characteristic that there is reversibility in time; that is, should the whole universe trace back the various positions that bodies in it have passed through in a given interval of time, but in the reverse order to that in which these...

Among the physical laws it is a general characteristic that there is reversibility in time; that is, should the whole universe trace back the various positions that bodies in it have passed through in a given interval of time, but in the reverse order to that in which these positions actually...

I am home-schooled, which just enforces the problem. Thanks for the suggestions everyone. I will take all of them onboard. I'm also looking to take on Kyudo, which is the Japanese art of archery. :)

Hello all. I am Vincit, a new member to the Physics Forums. I'm 15, and i got into the 'game' when i was quite young. I started learning Newton's Laws when i was 9 years old. I also started doing complex experiments such as creating haemoglobin molecules with stick magnets and metal balls...

There are not world age rankings on that site in plain sight. But if you actually checked, the highest record for anyone under 15 is 930. WR from GB. I'm 14.