Haven’t read your response yet but can tell this is going to be a discourse thank you so much…no sarcasm.
brucethemoose@lemmy.world 5 hours ago
You’re getting at a real mathematical thing. First some background:
In physics, the derivative of position, with respect to time, is velocity. In other words, if you measure the slope of a graph of an object’s position, you get its velocity.
The second derivative is acceleration. The third derivative is called “jerk,” or which is basically acceleration of acceleration.
Similarly, the derivative of energy, with respect to time, is power.
The second derivative of energy is what you’re describing.
This isn’t a commonly used unit though. In electrical systems its sometimes used as a “slew rate” rating, but it’s different than the units and measurements used in relation to frequency and AC power.
Patnou@lemmy.world 5 hours ago
Patnou@lemmy.world 5 hours ago
Ok let me get this straight. Velocity is the rate at which an object goes in a direction. That slides right into acceleration or how fast the destination near or further is changing? Hope I am good this far. So with that said then one of those dimmer lights for example if i put it on low the transfer rate will be slower but if I immediately hit the max it will be faster? kind of like a power supply changing it’s current. And if the slew rate signal is fast enough it will distort at the end? So basically to go to point A to point B I have to have a velocity and destination. Which would be B and origin would be A. At the rate I get there is the acceleration on top of acceleration. But at some point going from A to B I can in theory be possible to break a “slew point” with acceleration. But in the end it will come out messed up. But what is the speed at which one can go up to and through the slew point without overloading it? Would this not be an input of measure going from point A to point B? again thank you for the discourse and before I forget have a happy 4th.
brucethemoose@lemmy.world 4 hours ago
I’m not sure I follow; power and energy have nothing to do with velocity or acceleration in this context, its just meant to be an analogy.
If you flick a dimmer fast enough, it might distort, yes? But its unfortunately more complicated than “range of change of power” and has to do with how modern dimmers works.
Not exactly.
Where you are is your position.
The rate you get there is speed.
If you speed up or slow down, that’s acceleration.
And how “smooth” your acceleration is is what we call “jerk.” Slamming on gas or brakes would be a high jerk value, gradually pushing the petal until its all the way down would be a low jerk value.
Not sure I follow this, sorry. But if you’re talking about overloading electrical components, unfortunately this is really complicated and gets into how AC circuits work.
And as another random suggestion, you may want to look up dimensional analysis. If you’re trying to wrap your head around how stuff is represented, that’s it.
For example:
We measure position in meters (m).
We measure speed in meters per second. meters / seconds, or m/s.
Acceleration is meters per second, per second. meters / (second * second), or m / s^2.
Hence jerk is m / s^3
Energy is trickier to wrap your head around.
“Force,” aka how hard you push on something, can be measured as the acceleration of mass. Its unit is kilogram * meter / seconds ^2, or kg * m / s^2
Energy is force * distance. So kg * m^2 / s^2.
Power is energy per second. So kg * m^2 / s^3.
And what you were initially describing seems to be kg * m^2 / s^4.
Here’s another way to look at it.
What happens if you divide power by velocity? In other words, how “fast” is the power moving?
Well, that’d be:
(kg * m^2 / s^3) divided by (m/s)
And what do you get? kg * m / s^2. That’s force!
So maybe “force” is the answer to your original question of “what’s the ‘speed’ of power moving through stuff called,” if I’m interpreting it right.
Patnou@lemmy.world 3 hours ago
I mean in this in the utmost respect but I am bookmarking this for an example of how to have a general great discourse where you battle each other with knowledge. And it only ends when one is educated more. But with all respect to you,you gave me a knowledge boner from the knowledge nuke you just dropped more could learn from your about engagement and discourse.
slazer2au@lemmy.world 4 hours ago
No. Energy always travels through a medium at the same rate. The amount of energy you put into the light bulb won’t change speed the light is going between the emitter and the surface it reflects off.
brucethemoose@lemmy.world 4 hours ago
Well. It depends. And I’m not talking about relativity, set that aside.
The time it takes electrical power to get from a source to a destination (for example) isn’t instant, nor a constant. In practice, it’s affected by all sorts of initial conditions and their state through time, like impedance along the line. Or, more practically, what very complicated PWM voltage controllers are doing when you flip a switch.