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location Australia
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visits member for 2 years
seen 11 hours ago

11h
revised Could Charles-Augustin de Coulomb measure the charge in Coulombs?
added 117 characters in body
11h
comment Could Charles-Augustin de Coulomb measure the charge in Coulombs?
That is the law that says the force is proportional to the product of the charges (q1q2) and inversely proportional to the square of the distance between them (r2). Note that I stuffed up my answer: I said proportional to the distance. I've fixed it now.
20h
answered Could Charles-Augustin de Coulomb measure the charge in Coulombs?
Apr
13
comment How does the Hubble Redshift work?
+1 It's the clearest explanation I've come across
Apr
13
comment How much smaller will be human body, when we hypothetically get of every space between particles
As the nucleus is about 10^5 times smaller than the atom, its volume is roughly 10^15 times smaller. If your volume is 100 liters (100 * 10^-3 m), then you'd shrink to 100 * 10^-18 cubic meters, or roughly a 3 micron sized cube. Note that your mass would not change, so the spaceship's acceleration would still be the same.
Apr
10
comment Can we know full complete cycle of universe?
As far as we know the universe does not cycle.
Apr
9
answered Why doesn't our body gets crushed due to the atmospheric pressure?
Apr
8
comment Why does holding an electrical switch in between on and off states cause sparks?
@anna v yes, that was poetic licence. It's the lightning stroke that goes all the way, not the electrons. Ditto for electric current in a wire: the current moves from one end to the other at almost light speed, but the electrons themselves move very slowly.
Apr
7
answered Why does holding an electrical switch in between on and off states cause sparks?
Apr
6
comment Fuel and heated iron?
A grenade (and explosives in general) does not need external oxygen to explode, so it will work just as well in vacuum. In fact, it will work even better, as there is no air to slow down the fragments.
Apr
5
comment Fuel and heated iron?
And I'd add that, if you could put the red-hot iron in the petrol without the presence of any oxygen (for example, in a pure nitrogen atmosphere), it would not burn, but some or all of it would boil.
Apr
2
revised How is the image in a mirror created? Are there infinitely many light rays?
added 12 characters in body
Apr
1
answered How is the image in a mirror created? Are there infinitely many light rays?
Mar
30
answered Fuel and heated iron?
Mar
30
awarded  Fanatic
Mar
26
comment What is the smallest existing thing in theory and law?
And, of course, there is as yet no evidence at all for the existence of preons.
Mar
26
answered How fast does current flow? And the magnetic field?
Mar
20
awarded  Yearling
Mar
16
revised How do scientists place satellites into orbit?
fixed a typo (was: 1 to 11.2 instead of 7 to 11.2)
Feb
24
answered How do scientists place satellites into orbit?