1,161 reputation
620
bio website dotancohen.com
location
age 36
visits member for 2 years, 11 months
seen 7 hours ago

Dec
8
asked Does the strength of a smell depend on the volume or surface area of an agglomerate of material?
Dec
7
awarded  Popular Question
Sep
16
comment Lowest gravity on Earth's surface?
Relevant article
Sep
15
comment A machine which copies any object with 100% accuracy?
Which qualities? Macroscopic qualities such as functionality? Microscopic qualities such as surface defects? It goes back to my statement that the properties to be copied have to be well-defined.
Sep
15
answered A machine which copies any object with 100% accuracy?
Sep
13
awarded  Popular Question
Aug
10
awarded  Yearling
Jul
25
awarded  Popular Question
Jul
19
comment Why aren't gas planets and stars fuzzy?
possible duplicate of Why is Jupiter so sharply defined?
Jul
19
awarded  Citizen Patrol
Jul
9
accepted Beads in 'perpetual motion'?
Jul
9
comment Beads in 'perpetual motion'?
Wow, thanks, that is a great edit! It is so elegant once I see it! I assume that v is the initial velocity imparted by the hand? Thank you!
Jul
8
comment Beads in 'perpetual motion'?
Thank you. I suppose then that there is very little friction in this system? Also, I am having a difficult time determining a method for calculating the amount of force being exerted on the floor.
Jul
8
asked Beads in 'perpetual motion'?
Jun
26
accepted Why is the Pegasus launched from a subsonic airplane?
Jun
26
comment Why is the Pegasus launched from a subsonic airplane?
Thank you, I did not realise everything else in the launcher.
Jun
26
answered Why are spacecraft made to “spin” after launch?
Jun
26
comment Why is the Pegasus launched from a subsonic airplane?
Thank you. I don't see any information even suggesting that the M-21 crash was due to to a supersonic separation.
Jun
26
comment Is space “real”, or is it some sort of accepted postulate?
Spacetime
Jun
26
comment Is space “real”, or is it some sort of accepted postulate?
I see, Peter, you mean the dimensions of space. You'll be happy to known that we can in fact measure them, and there there are more than just three of them!