101 reputation
2
bio website statigrafix
location san diego
age 45
visits member for 1 year, 8 months
seen Jul 30 at 4:14
  • va san diego hsr&d
  • head of research > statigrafix <

Feb
24
answered What is the meaning of phase difference?
Feb
20
comment What happens if object is thrown in empty space?
You write "in empty space" but is there a gravitational potential?
Feb
19
comment Could a universe with purely Newtonian mechanics exist?
@JoeZeng, how do you plan on deciding one way or the other without access to such a universe?
Feb
19
comment Could a universe with purely Newtonian mechanics exist?
@MichaelBrown sure, in fantasyland
Feb
18
comment Could a universe with purely Newtonian mechanics exist?
Then the answer is no, because some things move fast, and some things are massive, and Newtonian mechanics could not account for observations like precession of Mercury, gravitational lensing, the accuracy of GPS and many others.
Feb
18
comment What's the basic difference between heat and temperature?
For one thing, heat and temperature have distinct units of measurement, the former being expressed in SI units of Joules, resp. Kelvin. Think of heat as an extensive quantity and temperature as intensive quantity.
Feb
18
comment In mechanics, is shock really better expressed as jerk instead of acceleration?
@Sankaran, re: "or a very sharp gaussian" - why Gaussian? how do you know that it's exponential for example?
Feb
18
comment In mechanics, is shock really better expressed as jerk instead of acceleration?
why jerk, why not snap, crackle or pop?
Feb
18
comment Could a universe with purely Newtonian mechanics exist?
Newtonian mechanics works in scenarios with not too much mass and where things move slowly compared to the speed of light. See Galilean invariance vs Lorentz invariance, which replaces it.
Feb
18
comment acceleration of the universe
Didn't Einstein show nothing moves faster than light?
Dec
29
awarded  Supporter
Dec
29
awarded  Autobiographer