Ehryk
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 Apr 29 comment How is 6W equivalent to 40W, as claimed by adverts for LED light bulbs? @BrianKnoblauch wire two '75W equivalent' LED lights to a hair dryer, and use that in your garage or under the hood then! You get 15x the heat output of a 100W light bulb, with more light! Apr 29 comment How is 6W equivalent to 40W, as claimed by adverts for LED light bulbs? @CuriousOne I clarifying that the power ratings aren't overspecced needlessly - though they may be an upper bound not a median for safety reasons, it wasn't a marketing thing to increase sales or anything. For LED lights, I somewhat agree they are marketing these really hard; the other thing they don't mention is that they are more directional, and a '40W' equivalent LED may not provide as much illumination in all directions as a 40W incandescent, and that also isn't mentioned. Apr 29 comment How is 6W equivalent to 40W, as claimed by adverts for LED light bulbs? Incandescent power ratings are important - they need to be matched to an outlet capable of supplying that wattage, or there can be fire risks. Over time, though, the buying public started equating power ratings (not over-specced) with brightness (not correct to do), and so we have these "40W equivalent" for people who still think of brightness in terms of incandescent power ratings. Apr 23 awarded Yearling Mar 16 awarded Popular Question Mar 16 awarded Popular Question Feb 2 comment Why is 7 TeV considered as a big amount of energy? I'll try to answer that with two assumptions: the 'average' collision rate is held constant for the entire season of "600 million collisions per second" (Source), and the energy released in every collision is ONLY the kinetic energy of stopping the particles. Thus, $600,000,000\ per\ second * 7\ TeV * 2 = 1345.83\ Joules\ per\ second = 1.35\ kW$, or $0.001\%$. This is, of course, absurd, as the 'purpose' of the LHC is more than just 'producing collisions', and the 120MW includes additional processing, cooling, etc. Jan 16 awarded Guru Jan 15 awarded Good Answer Jan 15 awarded Nice Answer Jan 15 revised Why is 7 TeV considered as a big amount of energy? Fixed typos, added airplane example for comparison Jan 15 answered Why is 7 TeV considered as a big amount of energy? Jan 10 awarded Notable Question Oct 6 awarded Good Question Oct 1 awarded Famous Question Jul 24 comment How does a planet's size really affect its surface gravity? Great ball park analysis! Good work. Jun 1 awarded Popular Question May 5 revised Hydrogen-boron fusion Used numbered list. May 5 suggested approved edit on Hydrogen-boron fusion Apr 29 comment Is there any disadvantage to sending rockets straight up? Right, but crossing into the Moon's SOI is roughly equivalent to what I meant by crossing the Earth - Moon L1.