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11th Class Physics Mechanical Properties of Fluids / तरलों के यांत्रिक गुण Question Bank Mechanical Properties of Fluids Conceptual Problems

  • question_answer
    In case of an emergency, a vacuum brake is used to stop the train. How does this brake work?

    Answer:

                    Steam at high pressure is allowed to enter the cylinder of the vacuum brake. Due to high velocity, the pressure decreases in accordance with Bernoulli's principle. The reduction of pressure lifts up the piston. This in turn lifts up the brake.


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