Is the perpetual motion machine functional?
Hi, I urgently need help with physics. As a group, we should take a closer look at the water cycle of a mill and assess whether the perpetual motion machine is functional. This involves the energy flow diagram and a corresponding solution.
The task is under picture A.
Figure A: Water circuit of a mill. The water flows from the upper tank A through the chute B to the turbine D. This drives a screw K via gears FG & H, which then transports the water back up. This circuit constantly rotates the turbine D and can, for example, be used to mill M to grind grain.
Consider whether this can work and justify your considerations.
We have created an energy flow diagram together and are wondering whether it is correct.
We have established the following justification: Because the law of conservation of energy is not observed, the perpetual motion machine is inoperable. The sun will cause the water to evaporate and dissolve into the atmosphere, and the devices in the water cycle will either fail after repeated rubbing against each other or rust from the water. While there are many concepts for the perpetual motion machine, none can be applied to real life. This is based on the fact that the perpetual motion machine violates the laws of physics.
Figure B Energy flow diagram.
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The one with evaporating, rusting and breaking is right, but not the point. The whole thing doesn’t work a minute. Because friction is produced everywhere and therefore non-usable heat energy. And it goes to flee every single step. Since there is no external energy supply, this will remain very fast if it should start at all. Once briefly into the equilibrium state and that was it.
Even if one assumes freedom of friction for the core process, no energy is available to drive the mill present in the image. And this needs straight friction to be functional.
Right.
The reasoning cannot vote. The energy conservation rate is always maintained. You can only make mistakes in an energy flow chart, so that not all Energy flows are captured and therefore one comes to the failure that it would be a perpetuum mobile (a perpetuum mobile never works).
Thanks for the feedback evrldocha! However, I have a question open. Is the energy flow diagram correctly set up? What exactly is missing in this?
lg
You did not take into account the energy flow through the mill in the energy flow chart (top right in the picture). The picture describes a cycle. If there is no friction, just as much energy is required for the pumping process as is generated by the falling water. However, the mill draws off a part of the energy to grind the grain small by means of friction. This means that the process remains practically immediately, even if all the other sub-processes would proceed without loss.
You can explain a lot of logic without being a scientist. The Perpeduum Mobile gives it in many designs. As a simple example, a magnet is placed on a charger with which a battery is to be charged. The output terminal of the charger is to charge the battery while the battery itself supplies the charger with enery. The following situation is present: input and output of the charger are short-circuited. Does the charger remain in operation when you remove the battery or stay on it? What do you think? Logically asks: can that work? By the way: A mechanical perpeduum mobile has a mechanical “short-circuit”. A 100% feedback so. Does it work? 😉
Without reading the text: No, the energy conservation rate applies. You have to accept that, it is as firm as the impossibility of the quadrature of the circle.
The task is, however, to prove at WELCHEM point the topic fails.
I know I only looked at the question title first. I’m just walking.
You don’t have to look at yourself.
There are No functional Perpetuum Mobile.