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Results tagged with energy-conservation
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user 62456
The law of conservation of energy, which states that the amount of energy in a system is constant. For questions about Earth's environment, see the climate-science tag instead.
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What's wrong with this idea for recover energy from pressure?
In this case: It's a theoretical study, just for find my error. No gravity. No buoyancy. All volumes are constant. I suppose no friction. Outside, the pressure of air is constant at $P$ (atmospheric p …
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2
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0
answers
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Friction and work from torque
I would like to understand where is the error in the third case, for that I gave 2 easier cases where I'm able to find the energy from heating is equal to the energy lost by torque.
Case 1/ Purple di …
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1
answer
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What prevents this rotational perpetuum mobile from working? [closed]
As a newbie in physics I imagine this device and I would like to know why it can't increase its energy.
Note I study the sum of energy during one second (or less) after set friction ON.
The device:
…
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Sum of energy from torques of several disks in double rotation [closed]
Here the study:
An external system (not drawn) give energy for rotate disks around themselves and around green axis. All disks have energy at start, at $t=0$ friction is ON and at $t=0$ external syst …
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