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  1. Robert Clark

    How long would inductor hold energy disconnected from battery but current flowed in alternate path

    Usually this question is asked in regards to just disconnecting the battery, like in the attached image. In that case the answer is just milliseconds. But in the analogous scenario for a capacitor, it could hold the charge for significant time because the charge would be held on the parallel...
  2. Robert Clark

    Force produced by pressurized water exiting a hose or pipe?

    Well known examples of the force produced by pressurized water exiting a pipe: JetLev Water Propeled jet Pack. https://youtu.be/n0109liIZGQ Hovering Car. https://youtu.be/s-2BN6FLDjA I need to calculate the maximum for the thrust produced when the hose or pipe is bent rearward. Since this...
  3. Robert Clark

    How does a pump trade flow rate for head, i.e., pressure?

    A pump’s power is a product of its pressure rise times volume flow rate. Commonly, a pump is specified by giving the pressure rise, or head, it can provide and the flow rate, such as in gallons per minute(GPM). But some pumps provide the user with a chart that shows how the pressure rise can...

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