meta user
network profile
| bio | website | ratsauce.co.uk |
|---|---|---|
| location | Chester, United Kingdom | |
| age | 52 | |
| visits | member for | 2 years, 4 months |
| seen | 7 hours ago | |
| stats | profile views | 3,132 |
Semi retired old time computer nerd who started programming on a Commodore Pet.
Since I'm also active in the Physics forum I should add that I started as a theoretical chemist, moved into solid state photochemistry and finally worked in industry as a colloid scientist. I only became a full time computer nerd in 1997.
|
19h |
answered | How to calculate air resistance of penny dropped from Empire State Building? |
|
19h |
answered | What is the wave length of the entire universe? |
|
20h |
comment |
Why do prisms work (why is refraction frequency dependent)? See also physics.stackexchange.com/questions/65156/… |
|
1d |
comment |
Does one second exist? This is an example of Zeno's paradox, and it's more philosophy than physics. |
|
1d |
comment |
How much negative charge do I accumulate by touching the earth? The Earth isn't behaving like a charged sphere. It's more like a plate capacitor with the Earth's surface acting as one plate and the atmosphere about 50km up acting as the other plate. In between the field strength is around 100 volts per metre. See the Wikipedia article on atmospheric electricity (en.wikipedia.org/wiki/Atmospheric_electricity) for more info. |
|
1d |
answered | Lightning and Charge Displacement |
|
1d |
revised |
What is the reason why anyons escape spin-statistic theorem? Fix link |
|
1d |
answered | Can a single molecule have a temperature? |
|
1d |
comment |
Group Theory in General Relativity It's a quibble, but weren't Killing vectors named after a chap called Killing, so they should have a capital K? |
|
1d |
comment |
The Univere's mass-energy and uncertainty Mike, the link Ben posted may not be an obvious duplicate. The point is that the net energy of our universe may be zero (or infinitesimally small) and that's why our universe can last so long. The idea is that the gravitational energy balances the matter energy and the lot adds up to zero. |
|
2d |
answered | Calculate energy from an reaction |
|
2d |
answered | Producing Ice with water in vacuum |
|
2d |
comment |
Non-isolated universe and arrow of space Energy is not conserved in General Relativity. See physics.stackexchange.com/questions/2597/… for a discussion of this, or Google for lots more info available on the web. |
|
May 22 |
answered | Frank Hertz experiment and different jumps |
|
May 22 |
answered | How can the big bang occur mathematically? |
|
May 22 |
comment |
How fast could a football drop? Related physics.stackexchange.com/questions/47795/… |
|
May 22 |
comment |
How fast could a football drop? @Lagerbaer: Once the air flow is turbulent it's a quadratic dependance on speed. Typically this happens above a few m/sec. However over very large velocity ranges the constant drag coefficient $C_D$ isn't constant. |
|
May 22 |
comment |
Kinetic energy when $F(t)$ graph is given @SaurabhRaje: please accept the answer if you're happy with it. |
|
May 22 |
comment |
$SiO_2$ PVD deposition to HDPE (plastic) I'd be surprised if you could get silica to stick to HDPE. Possibly if you chemically treated the surface e.g. flame it. |
|
May 22 |
answered | Can we apply de Broglie's relations to sound waves? |
