Free energy and perpetual motion machines - Is it possible??

Replies

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  raj87verma88

  Somehow I have a lot of doubts regarding this video. Will have to see it again tomorrow and think clearly before making a verdict.
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  ashuashi

  saw the video. Cant say what it is really. But it was a good one.
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  silverscorpion

  Perpetual motion means [SIZE=-1]motion that continues indefinitely without any external source of energy.That is, once a device is set into motion, it'll be in motion indefinitely, and will never come to a stop. That is practically impossible due to friction.
  But in this video, they have claimed to have constructed such a device and extract energy from it.
  Basically, if we get more energy at the output of a device than what amount is input, then that energy is called a free energy. That is also impossible according to me, because, if such a thing were possible, we would have solved our energy needs long ago.
  And more importantly, it also violates the second law of thermodynamics, and anything which does so is physically not realizable.
  what's your take on this, CEans?
  [/SIZE]
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  Ashraf HZ

  I also agree its impossible. Nothing in life is free *grin*
  
  I think better focus on utilizing energy from the sun. It is highly underutilized, and it will last a few more billion years.
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  julie1

  That is true nothing is life is free... it makes you pay in return somehow so i don't think it is possible too
• 

  xheavenlyx

  My same views are excellently put by @silverscorpion! Absolutely true.
  
  

  [SIZE=-1] 1. If such a thing were possible, we would have solved our energy needs long ago.
  2. And more importantly, it also violates the second law of thermodynamics, and anything which does so is physically not realizable.[/SIZE]

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  silverscorpion

  But then, something troubles me.. A few days ago, there was a seminar on latest trends in electronics in our college, and a guy from texas instruments gave a lecture on the same.
  He mentioned he was working on wireless sensor networks which derive their own power and no external power supply is required because, those sensors function with very little power. But, however little it may be, how can the sensor find it's power on it's own? He said this is also some kind of 'nearly' perpetual motion device. i dunno how..
• 

  Ashraf HZ

  silverscorpion

  But then, something troubles me.. A few days ago, there was a seminar on latest trends in electronics in our college, and a guy from texas instruments gave a lecture on the same.
  He mentioned he was working on wireless sensor networks which derive their own power and no external power supply is required because, those sensors function with very little power. But, however little it may be, how can the sensor find it's power on it's own? He said this is also some kind of 'nearly' perpetual motion device. i dunno how..

  haha, no.. they can be directly powered by electromagnetic waves or even solar. As you said, they require very little power.. down to the microwatts. The natural surroundings of the device provides it with power.
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  silverscorpion

  electromagnetic waves? I'm confused. Well, I know that Em waves are the propagation of energy. But if it's possible to transfer energy thru EM waves, then wireless charging of mobile phones et all, should be possible, right? I thought EM waves only carry information, like in FM waves or in cell phone signals.
• 

  Ashraf HZ

  Basically, EM waves when modulated carry information. Its like sound waves.. we modulate the sound to send a signal (speech), but the pressure waves that carry the information contains energy too.
  
  Yep, it is possible to charge mobile phones wirelessly. However, mobile phones consume so much juice that you'd have to transmit a lot of microwave power from the base station to get a decent charge. That amount of power will fry humans 😛
  
  But, if you use a more directional antenna and focus a beam of em waves to the target, you well get decent energy transferred without requiring a lot of power.
  
  Something you might not also realize is that you can listen to FM signals, using a earphone receiver directly powered by the EM waves propagating it 😛 Its an interesting project to do.