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1d
awarded  Explainer
2d
awarded  Yearling
Aug
27
comment Can a human size object move so fast that it ceases to be observable?
@Jim: I find your revised answer much more useful, and have now retracted my downvote. I'll delete my earlier comments as they are no longer relevant. Thanks for taking the time to improve your answer and being so gracious about it.
Aug
10
comment What happens when the speed of a body is less than optimum speed?
Is upward the only useful direction?
Aug
5
comment what property of steam makes it the preferable motive fluid in jet ejectors? why not air or nitrogen?
By leaving out economic factors you may be leaving out the most important reasons. In the absence of those factors it may make no sense to use water in preference to unobtainium.
Jul
25
awarded  Nice Answer
Jul
15
comment The measurement of electricity
@user4835: The point is that voltage alone is not enough, you must have a conducting path (i.e. charge carriers). In ohmic conductors, the current depends on both the voltage and on the characteristics of the conductor - it's resistance. Therefore the power used (not earned) depends, as you say, on both voltage and current.
Jul
14
comment Is fission reaction considered natural or artificial?
"the Gabon nuclear reactors are remarkable because they spontaneously began operating around two billion years ago, and they continued to operate in a stable manner for up to one million years."
Jul
14
revised Is fission reaction considered natural or artificial?
Useful link
Jul
14
revised The measurement of electricity
added 233 characters in body
Jul
14
answered The measurement of electricity
Jul
14
comment Difference between weight of water and pressure of water
@User52187: You can redraw John's diagram with equal base areas. Johns remarks then apply just the same.
Jul
6
revised transfer of electricity through electromagnetic waves
added 313 characters in body
Jul
6
answered transfer of electricity through electromagnetic waves
Jul
6
comment How does my kitchen scale know I'm holding it?
Its most likely due to one or more of the physical design, the location of the sensor, the way you hold it and the compliance of the surface your hand. Your hand is always moving a little, that might be a factor.
Jul
6
comment Can we pass electricity through air?
See amasci.com/miscon/whatis.html.
Jul
4
comment Question on the provability of the physics laws of the Newtonian Mechanic
See Why does the universe obey scientific laws?
Jul
4
comment Can we pass electricity through air?
It isn't true that "electricity means the flow of electrons". Even electric current is not necessarily a flow of electrons. Are you only interested in electron movement/drift?
Jul
3
comment Can I compute the mass of a coin based on the sound of its fall?
@Kusha: slot machines? coin sorters? Accoustic analysis is used in many fields, e.g. detecting incipient cracks in wind turbine blades.
Jun
19
comment Does the pressure inside a tire equal to its average ground pressure?
... I, ahem, really meant spend 3 days trying to get your 3D printer to fabricate a planimeter of course. :)