108,968 reputation
4166295
bio website ratsauce.co.uk
location Chester, United Kingdom
age 53
visits member for 3 years, 9 months
seen 15 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.


10m
comment What is the negative energy that they talk about in the design of hover-boards?
This question appears to be off-topic because it is about a fictional technology used in a science fiction film. Sorry :-(
5h
comment what kind of wings would a person need to fly?
Related: Is it possible to fly like a bird using semi-motorized wings?
9h
reviewed Close Flea jumping question
9h
reviewed Close Speed of an object in air versus in vacuum
9h
reviewed Close Hooks Law and acceleration
9h
reviewed Leave Closed At what velocity does space no longer equal a vacuum?
9h
comment At what velocity does space no longer equal a vacuum?
Are there no (other) SF fans reading this? The quote is about streamlining ships to deal with the 5 Hydrogen atoms per m$^3$ density of insterstellar matter at near light speeds. As it happens the question is a duplicate and the issue has been discussed in Would a fast inter-stellar spaceship benefit from an aerodynamic shape?. tl;dr you need to be very, very close to the speed of light for the effect to become important.
9h
comment About time measurements
It isn't clear to me why you think the continuity of time and the illusion of time flowing are incompatible, or even related.
18h
awarded  Enlightened
23h
answered Direction of pressure in fluids
1d
reviewed Close Are Lockheed Martin nuclear fusion claims realistic?
1d
reviewed Close Recent important observations on dark matter
1d
revised If something is not moving in space, is it moving on the time axis at the speed of light?
Damn I always get that spelling wrong
1d
answered If something is not moving in space, is it moving on the time axis at the speed of light?
1d
reviewed No Action Needed Difference between a “source dipole” and a “force dipole”
1d
comment Discrepancy in introducing Schottky barrier
The bands aren't discontinuous because the junction isn't infinitely thin. The energy level varies continuously (but steeply) across the junction. The force on carriers is indeed very high, but it acts only over a very short distance. The force times distance is of course equal to the difference in the energy levels.
1d
answered Explanation for negative specific heat capacities in stars?
1d
reviewed Close Quantum Mechanics: Eigenstates for Quantum operators
1d
reviewed Close Why does gravity enact force?
1d
reviewed Close How to find the moments of A and B