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Feb
3
comment How do stars from far away affect Earth?
@Floris, even European and Indian astrologers don't pay much attention to stars (planets, sun, moon, even asteroids, but not stars apart from the sun). Arabian astrology does though, which left its legacy on modern astronomy in the names for so many of the stars that are visible to the naked eye having names of Arabic origin.
Jan
19
comment How am I able to stand up and walk down the aisle of a flying passenger jet?
People walking down the aisle of a plane travelling at 250 m/s could, if the plane collided with a cliff, suddenly stop travelling at 250 m/s. That's when they're going to find walking down the aisle suddenly difficult.
Apr
16
awarded  Supporter
Mar
22
comment Could we send a man safely to the Moon in a rocket without knowledge of general relativity?
"Dead reckoning" was in use for at least two hundred years before the explanation that it was short for "deduced" was arrived at. It's more likely in contrast to the continual "live" data one has in using stellar navigation (this being when people navigated by celestial bodies, rather than to them), since dead reckoning was used when that wasn't available. The first attested use points out the contrast; "Keeping a true, not a dead reckoning of his course."—Mark Ridley, A short treatise of magneticall bodies and motions, 1613.
Dec
3
comment How do microwaves heat moisture-free items?
If you are going to do this experiment, be careful as to the plastic you use; some (e.g. the melamine used in "unbreakable" plates and cookware) will not only heat up considerably but can also crack explosively and/or release formaldehyde. Stinks up your kitchen for ages.
May
1
comment Why does squeezing a water bottle make the water come out?
If the volume is constant, why can you not squeeze a bottle as much with the cap screwed on?
Mar
24
awarded  Citizen Patrol
Jan
27
awarded  Autobiographer