144,003 reputation
13244403
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 6 months
seen 1 hour ago

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.


3h
comment The difference between $R(r)$ vs $r$ graph for $4s$ and $5p$ orbital
Yes, that will be fine. You might want to set $a_0$ to one. That just means the $x$ axis on your graph will be in units of $a_0$.
4h
comment The difference between $R(r)$ vs $r$ graph for $4s$ and $5p$ orbital
This PDF has equations for the 4s and 5p radial functions. I'll leave it as an exercise for you to plot them using Excel, or your preferred spreadsheet.
5h
revised The difference between $R(r)$ vs $r$ graph for $4s$ and $5p$ orbital
edited tags
5h
revised Can you tell your absolute speed in space?
Tweak
5h
comment Can you tell your absolute speed in space?
@martinc: You need to bear in mind that as far as you on the rocket are concerned you are at rest, and it's the rest of the universe that is accelerating away from you. So the question is whether you'd see the rest of the universe exceed the speed of light relative to you. The answer is that this doesn't happen, though the spacetime geometry you see actually gets quite complicated. If you're interested it's called the Rindler metric. Nevertheless, the acceleration you feel remains steady at 1g and you can't use this to for absolute speed.
5h
comment Can you tell your absolute speed in space?
@martinc: as I said in my first paragraph, the occupant of the ship will find the acceleration is constant, no matter how long they accelerate for. That means they can't use changes in their acceleration to determine an absolute speed because there are no changes in acceleration.
5h
revised Can you tell your absolute speed in space?
Typo
5h
answered Can you tell your absolute speed in space?
6h
comment Do the ground levels of different materials align the same way the vacuum levels do when the materials are separated?
It's just the difference in the work functions isn't it? Or am I missing something?
14h
reviewed Looks OK Is our galaxy colliding with Andromeda, or is Andromeda colliding with our galaxy? (i.e. Which is moving less / staying still?)
14h
comment Why can't people just pump water from ground and flood deserts to make them habitable?
@akhmeteli: I haven't downvoted, but I thought this was a comment rather than an answer. An answer would have to be considerably more quantitative.
14h
answered Is our galaxy colliding with Andromeda, or is Andromeda colliding with our galaxy? (i.e. Which is moving less / staying still?)
15h
reviewed No Action Needed Is our galaxy colliding with Andromeda, or is Andromeda colliding with our galaxy? (i.e. Which is moving less / staying still?)
15h
reviewed Reviewed Black-holes are in which state of matter?
15h
reviewed Looks OK Is our galaxy colliding with Andromeda, or is Andromeda colliding with our galaxy? (i.e. Which is moving less / staying still?)
15h
reviewed Delete Why can't people just pump water from ground and flood deserts to make them habitable?
15h
comment Why can't people just pump water from ground and flood deserts to make them habitable?
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post.
15h
reviewed Close Why can't people just pump water from ground and flood deserts to make them habitable?
15h
reviewed Close Finding the electric field of a NON uniform slab?
15h
reviewed Close Does the spring effect a moving ball?