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Apr
27
awarded  Yearling
Oct
28
reviewed No Action Needed Can the de Broglie wavelength become infinite?
Oct
25
reviewed No Action Needed Our Perception of Heat
Oct
20
awarded  Revival
Oct
2
comment Do wind turbines convert the kinetic energy of air?
@OHLÁLÁ with asymptote asymptote.sourceforge.net
May
24
comment Electric Flux through metal plate by uniformly charged wire
find the electric field at a point on plate, then find the normal component, then integrate. post your calculations if didn't find the answer.
May
24
comment Electric Flux through metal plate by uniformly charged wire
you also need the distance
May
24
comment Optical path difference
because we assume that our lens is perpendicular to the reflected rays (i.e. parallel to DF). so the blue line should be parallel to DF.
May
24
comment what is the temperature (and pressure) of the oxygen inside an oxygen bottle?
It is stored both as high pressure gas and liquid. It does not equilibrate because it's being cooled. en.wikipedia.org/wiki/Oxygen_therapy#Storage_and_sources
May
22
comment Black Body Golf Balls
You could use a cube of the same volume. It has more surface area and none of its rays will be re-absorbed.
May
20
comment Applying unsteady Bernoulli (to a balloon attached to a tube)
@timni A massive pendulum feels a large torque but it also has a large inertia and they cancel out. A capacitor with more charge also has more current while discharging. Here you have more mass but also more pressure.
May
20
comment Applying unsteady Bernoulli (to a balloon attached to a tube)
@timni Change of volume should be equal to volume flow rate. I think it's pretty much intuitive. The assumption that pressure at the surface of balloon and mouth of the tube is equal is valid when we could neglect effects of the velocity in the balloon. Apart from that it's make sense.
May
20
answered Applying unsteady Bernoulli (to a balloon attached to a tube)
May
19
reviewed Reviewed Do we weigh more when standing near massive buildings?
May
19
comment Bernoulli Equation for isentropic ideal gas flow
@mcocdawc it's not equivalent. to be isentropic it must be frictionless (since friction is irreversible) but it's not sufficient. frictionless flow with heat transfer (rayleigh flow) is also non-isentropic.
May
19
reviewed Reviewed Bernoulli Equation for isentropic ideal gas flow
May
19
reviewed Reviewed Do holes have physical existence?
May
19
revised Do wind turbines convert the kinetic energy of air?
added 157 characters in body
May
18
comment Solve unsteady state Bernoulli equation for flow in a pipe
you should probably upload a sketch showing where is the cut, and geometry of the pipe. just to be clear by "the closed off pipe" you mean fluid can not flow out except through the cut?
May
18
comment How is the kinetic energy of the wind transferred onto a lift based wind turbine?
I posted a new answer to that question, which answer your question as well: physics.stackexchange.com/a/184730/23679