Recent content by andywelik

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    Undergrad Why not Solar -> Electrolysis -> Burn to make steam energy?

    Is not the air I take into my lungs and all other human beings and all animals take into their lungs not free? How about sea water in all the oceans free for anybody to swim in if they want to? How about the rain that comes down from the clouds? So the adage that nothing is free is not...
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    Undergrad Why not Solar -> Electrolysis -> Burn to make steam energy?

    Solar heat and light are abundantly available and so there should be no talk of wasting any electricity produced by both. With abundant electricity, let's say in the deserts of Saudi Arabia, thru' solar, there should be no problem splitting water into H2 and O2. Now H2 being a fuel and O2...
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    Undergrad Why not Solar -> Electrolysis -> Burn to make steam energy?

    Why not Solar --> Electrolysis --> Burn to make steam energy? Solar heat and light are both available in abundance, especially in the tropics. That being so, why is that no attempts have been made to use Solar-Electricity to split water in large amounts, into H2 and O2 to boil water to produce...
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    Undergrad Does a particle at the center of a spinning wheel have zero velocity?

    You are right. Thanks, Infinity has no beginning nor end. Now I realize that no one should think about a dead-centre point when it comes to a spinning/rotating disc/wheel. Even though the linear speed is zero at the dead centre, logically thinking, zero speed is never reached in angular...
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    Undergrad Does a particle at the center of a spinning wheel have zero velocity?

    Take a liquid passing thru' a pipe. The molecules that adhere to the inside surface of the pipe move very slowly while those outside of the thin film on the pipe move faster. On a solid this could never be.
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    Undergrad Does a particle at the center of a spinning wheel have zero velocity?

    Let's take the centre point. Imaginarily enlarge it a million times. Take a photo of it, imagined of course. Won't that show the point you mention?
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    Undergrad Does a particle at the center of a spinning wheel have zero velocity?

    Thank you all for taking the trouble to explain.
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    Why glucose batteries might compete with food crops

    Sugar-cane can easily be replaced with other plants that are not used for making sugar for human consumption.
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    Undergrad Does a particle at the center of a spinning wheel have zero velocity?

    Zero linear speed multiplied by any other number is still zero, no matter what the formula is. Is that not true?
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    Undergrad Does a particle at the center of a spinning wheel have zero velocity?

    OK no problem. Let's convert rotational to angular. Won't there be a speed at dead centre which cannot be converted because linear zero speed has reached?
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    Undergrad Does a particle at the center of a spinning wheel have zero velocity?

    Let's imagine a spoke on a spinning wheel like that of a cart wheel. Now we know and can see that the outermost particles of the spoke have a higher speed than the inner particles. As we get closer and closer to the centre, we know that the speed gets slower and slower. Here's my question...
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