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Nov
1
answered How did Cook and other astronomers time the 1769 Venus transit?
Oct
31
awarded  Good Answer
Oct
30
comment What's the difference between vacuum pump and vacuum cleaner?
Turbomolecular vacuum pumps are just a fan that spin very fast and work in pretty much the same way. They reach much lower pressures than displacement pumps
Oct
29
awarded  Necromancer
Oct
28
awarded  Enlightened
Oct
28
awarded  Nice Answer
Oct
18
awarded  Enlightened
Oct
17
awarded  Nice Answer
Oct
16
revised Are we increasing the gravity of Earth with our population?
added 438 characters in body
Oct
16
answered Are we increasing the gravity of Earth with our population?
Sep
23
comment Can we weld two dissimilar metals without using LASER welding?
You just need to heat the two metals to above their melting points without allowing anything chemical to happen to them. Normally means heating them quickly without a flame - see friction welding
Sep
22
comment What would happen if you split an antimatter nucleus?
physics.stackexchange.com/q/106632
Sep
20
revised Do photons decay as they travel in free space
added 5 characters in body
Sep
20
awarded  Enlightened
Sep
20
awarded  Nice Answer
Sep
19
revised Do photons decay as they travel in free space
typo
Sep
19
revised Radioisotope beta decay generator
added 83 characters in body
Sep
19
comment Radioisotope beta decay generator
You have to take either spacecraft engineering, or "insane devices for evil supervillains 101"
Sep
19
comment Do photons decay as they travel in free space
Please ask the 2nd part as separate question - it is a good question and deserves its own answer.
Sep
19
answered Do photons decay as they travel in free space