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Navigate Surgical Technologies innovative motion tracking and augmented reality for surgeons.

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Oct
9
answered How do you choose the locations of forces when calculating moments?
Oct
8
comment Question on the stability of the solar system
@Ron well presumably it's been stable enough for 5Bn years to have the earth remain intact. And stable enough for life for 3.5Bn
Oct
7
comment domestic electric AC wiring - Live and Neutral correct or not?
@Georg in CE it's only required for non-earthed double insulated appliances. Using earthed appliances in a system with an indetermined L/N is interesting.
Oct
7
answered domestic electric AC wiring - Live and Neutral correct or not?
Oct
5
answered Effects of high frequency lighting on human vision?
Oct
5
answered What is the difference between electric potential, potential difference (PD), voltage and electromotive force (EMF)?
Oct
5
answered What was so surprising about accelerating cosmological expansion?
Oct
4
comment What's the difference between gas and plasma?
I was never happy about plasma as a separate state of matter. If ionising it makes it a new state, why doesn't having iron magnetised make it a new state, or having a liquid crystal with and without a voltage different states ?
Oct
4
answered What Is the Noise of an MRI Machine
Oct
4
revised Is the Sun-set and the Sun-rise Symmetrical for the Observer?
added 72 characters in body
Oct
4
comment Would you feel weightless if falling or flying up in a vacuum?
@sabiland - No it's just a different way of picturing it. Electromagnetism isn't a real force - it's just the exchange of photons.
Oct
3
comment Is the Sun-set and the Sun-rise Symmetrical for the Observer?
@Peter - from a purely orbital/geometric point, no they are identical.
Oct
3
answered Is the Sun-set and the Sun-rise Symmetrical for the Observer?
Oct
3
answered Would you feel weightless if falling or flying up in a vacuum?
Sep
19
awarded  Quorum
Sep
16
answered Over what distances can one send/ receive from a GPS chip implant in a dog?
Sep
15
comment Why is the energy density of gasoline so high?
@Chris - actually diesel is better. It has a lower evaporability and flash point so it's safer to handle but it has a higher energy density and you can burn it more efficiently in a simpler engine.
Sep
14
comment What widely recognized organizations set standards used by physics?
@Michael - I had never heard of it until I found it googling IUPAC, which suggests it's not exactly at the forefront of every physicists mind!
Sep
14
revised Function of air conditioner
added 7 characters in body
Sep
14
answered What widely recognized organizations set standards used by physics?