109,131 reputation
4166295
bio website ratsauce.co.uk
location Chester, United Kingdom
age 53
visits member for 3 years, 9 months
seen 34 mins 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.


10h
reviewed Close can there be an object which reflects( not illuminates ) electromagnetic waves in the non visible region?
10h
comment Concerning the transtition between matter dominated universe and radiation dominated universe
@Gödel: no, all four contributions to the density are treated together.
13h
reviewed Leave Open Conceptual Question on Work and Potential Energy
13h
reviewed Leave Open What will happen if a hairdryer is turned on in an air tight box?
18h
reviewed Approve suggested edit on Water escaping from a pendulum bob, how is time period affected?
19h
reviewed No Action Needed Wrong calculation of work done on a spring, how is it wrong?
19h
comment Concerning the transtition between matter dominated universe and radiation dominated universe
@Gödel: see How does the Hubble parameter change with the age of the universe?. This shows how the scale factor is calculated taking into account radiation as well as matter.
19h
answered Quantum mechanics: Finite square well problem
21h
answered Can we harvest energy from constant gripping?
21h
reviewed Close what is variable mass of earth or center of mass?
21h
reviewed Leave Open How to calculate how much air is leaking out of an object?
22h
comment What are the advantages of Magnetocardiography?
I'm not sure this is really a physics question.
23h
comment About time measurements
This is really a new question, but see for example this SciAm article (you'll need a login).
1d
reviewed Reviewed Why does matter gather as discs around massive objects?
1d
reviewed Leave Closed Advanced Gravitational Waves?
1d
reviewed Close Finding net force
1d
comment How does Hendo hoverboards achieve the self-propelling motion? What is the MFA?
@Hypnosifl: possibly, but the Hendo engine uses rotating permanent magnets.
1d
revised How does Hendo hoverboards achieve the self-propelling motion? What is the MFA?
Typo
1d
answered How does Hendo hoverboards achieve the self-propelling motion? What is the MFA?
1d
comment How does Hendo hoverboards achieve the self-propelling motion? What is the MFA?
@jim: indeed, and there are lots of ways to make things hover. However there are none based on negative energy. If Luxii wanted to change the question to ask how a Hendo hoverboard works then that would be a good question and I'd remove my close vote.