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visits member for 1 year, 10 months
seen Jul 10 at 6:26

Apr
27
answered Newton's Third law of motion: A hammer hits a wall vs. hits a tire
Apr
27
answered Inertia of a body cancells some amount of force?
Jan
13
comment Measuring depth or height from sea level
For some applications (especially where GPS signal is lost : underwater, caves,... or where cost/energy matters), the atmospheric pressure is still widely used. For good accuracy, it should be compensated for pressure variations measured at a known point.
Sep
26
awarded  Yearling
Nov
21
comment Maxwell's demon - scaling down from something that seems to work
correct, but this doesnt violate the 2nd law since your damper would merely transfer heat to a laeger reservoir.
Nov
20
revised Maxwell's demon - scaling down from something that seems to work
added 125 characters in body
Nov
20
answered Maxwell's demon - scaling down from something that seems to work
Nov
9
answered Microwaves and state of matter
Nov
7
awarded  Critic
Nov
7
answered How are the finite speed of light and the atomic nature of mater related to the end of Moore's law?
Oct
31
answered Electron in strong magnetic field
Oct
31
answered Spring force vs Spring Potential Energy?
Oct
31
comment Why does rubber ball bounce back while iron ball doesn't?
They're pretty similar actually. In both cases the kinetic energy of the incoming ball is stored as an elastic (=reversible) deformation of the ball. The difference between rubber and steel is that the magnitude of the deformation required to store all the initial energy is much smaller for steel (Young's modulus of steel is about 10^4 times higher)
Oct
30
comment Why does rubber ball bounce back while iron ball doesn't?
Well in that case it means that either the ball itself gets scratched, or it bounces back. Note however that even very small scratches or bumps amount to significant energy loss.
Oct
30
comment Why does rubber ball bounce back while iron ball doesn't?
The velocity is not so much in question as the ability of the wall to deform and bounce back while giving all the initial energy back
Oct
30
answered Why does rubber ball bounce back while iron ball doesn't?
Oct
30
answered Why are we living in the $q$ part of the phase space?
Oct
30
answered Why isn't all of the dust in a nebula used in the formation of a star?
Oct
29
awarded  Citizen Patrol
Oct
22
comment What is the reason of the semidiurnal pressure oscillation in the atmosphere?
That seems just like it! I'll try and understand that as soon as I can!