The balls in the middle of newtons cradle don’t move either.
Newton’s cradle sounds like a kinky sex move, which is ironic since Newton was likely a virgin.
In certain kink circles, Newton’s cradle IS a kinky sex move!
I knew it!
Yeah. Sort of like holding two ends of a chain and dragging it back and forth. Even if the chain isn’t traveling the full length, it’s still moving and you could still extract power from the system if you attached something to the middle of the chain.
imagine a bicycle chain between two sprockets, if you crank it foward and back like 1 inch, over and over again, you can clearly transmit power without the chain links going much of anywhere
when you touch something we never actually touch it is all just fields interacting all the way down
just the
tipfields
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They’re giving you excitations
The microwave doesn’t heat your food, it just vibrates the water.
Heat is kinetic energy and the water is part of your food, so the microwave does heat your food.
Thank you for explaining the joke
What joke?
Elections merely facilitate the transfer the power, like (the non-leading edges of?) a drive shaft or cogs.
Even with DC you need a loop (well, a difference).
Carbon fuel one-use mentality where you burn your supply (chemically stored energy) doesn’t apply, tho non-rechargeable batteries make it seem so.
non-rechargeable batteries
Yeah, why are they still a thing? Recharchables have all the advantages but more.
Low self discharge. Good for ultra low power devices like remote controls or lights only used on occasion where a rechargeable battery would self discharge faster than the rate of actual use.
Let’s hope those paper batteries by Flint (shown at CES) aren’t bs marketing (that they truly aren’t harmful as waste & are comparable to normal batteries).
Ah right, i forgot about that.
Steam engine pistons also move back and forth less than a meter at a time, and still could push trains a million kilometers in the forward direction. It’s that they’re pushing right while moving right and left when moving left. That’s like when AC current and voltage are in phase, delivering positive net power. Meanwhile, something that pulls left when moving right is consuming power.
The electrons don’t move very quickly either. Like, a sluggish one millimeter per second is more current density than most metal conductors can handle without melting. Thankfully, there’s lots of mobile electrons carrying charge (coulombs) so that’s a lot of current. “Electricity” only travels near the speed of light because voltage is like a force sending waves through the electric field (simplified). And it’s instantaneous current (amps =
joulesedit: coulombs / second) times voltage (electric field potential difference in volts = joules per coulomb) that delivers power.Simplifying to a single harmonic (pure 50Hz/60Hz sine voltage source and a passive, linear RLC load), you need not only multiply the voltage’s and current’s effective amplitude (that gets you apparent power in VA, voltamps) but also their power factor or cos φ (the cosine of phase beetween them) to get power in W (joules per second). If the cosine is one, it’s a purely resistive ® load (like a heater) with a phase difference of 0°. If the PF is zero, it’s a purely reactive (L/C) load (a freewheeling synchronous motor is much like that) with a current phase of ∓90° and no power is consumed overall. If the cosine is negative, power is actually being generated by the device you’re measuring (for instance, old elevators and escalators with synchronous motors are actually delivering power into mains when enough people are travelling down).
Amps are not joules / second;- that would be Watts. Amps = Coulombs / second, and Volts = Joules / Coulomb. That’s why multiplying them gives you power in Watts.
That’s true instantaneously but as you say, if the current or voltage are alternating then you can’t just use the AC current and voltage to get real power like you can with DC.
You are correct, that was a mistake.
However, although symbols of units named after scientists (V, A, W, C, J, Ω, H, F, T, Hz, S, K, N, Pa, Bq, R, Ci) are uppercase, they are lowercase when written out (volt, amp(ère), watt, coulomb, joule, ohm, henry, farad, tesla, hertz, siemens, kelvin, newton, pascal, becquerel, roentgen, curie) to differentiate them from the surnames. Also be careful with degrees (Celsius, Fahrenheit, Rankine, Réaumur…) and grams (g, not G or gr), unrelated to the bacteria-ranking Christian Gram. And yes, the l/L debate is why the Claude Litre hoax was created. (In Unicode-capable applications I use 𝑙 BTW)
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Theres a gnarly your mom joke in here somewhere
Yep, exactly why it works so much better over distance than DC.
That’s not correct. What you need for long distance is high voltage, and it’s easier/cheaper to step up/down AC voltage than DC. If conversion costs were eliminated, DC is actually more efficient.
If you get to even longer distances of over 300+ miles, DC’s efficiency becomes worth the additional cost of conversion. There are many HVDC interregional connections.
At distances closer to a quarter wavelength you can also have some pretty gnarly reactions if a line goes down. That’s why stuff like the Kahora Bassa power plant uses HVDC for transmission.
Kind of like how a piston in an engine also kinda just “shakes about” (because of explosions or steam or whatever) and yet delivers a lot of power.
In an tidal earth system, the water doesn’t even go anywhere, it simply vibrates back and forth
Presumably the vibrating back and forth causes a net negative charge to propagate down the line?
There’s a neat video by smarter everyday (and a bunch of back and forths among youtubers, including electroboom) where they show it and argue about it, but the power is actually transmitted through the electrical fields ‘outside’ of the wires.
Imagine a loop of electrical wire that is 300,000km long. Your switch is at point A, and the light bulb is at point b, halfway along the wire. If the energy truly ‘propagated down the line’ it would take half of a second for the light bulb to turn on when you flipped your switch to complete the circuit. Interestingly, if you make the loop so that points A and b are closer than the lines maximum possibility (or, in other words if you imagine the loop as a 0, the points are at the left and right of the 0 instead of the top and bottom), then the light bulb turns on based on how far apart the points are, not the distance of electrical line between them.
Unless smarter every day made a video I haven’t seen and can’t find, you’re thinking of veritasium.
Doh! Thanks, that’s probably it.
Nah. Power is just the potential to do work. Clever electrical engineering just takes advantage of the teensy pushes and pulls to do that work. Like pushing a swing, I don’t move but my kid sure can go high when I apply those pushes and pulls at the right time.
Until they jump off Then The Things get spicy…
