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Artery walls are very strong and elastic...

Artery walls are very strong and elastic. Why?

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The walls of the arteries are strong and elastic. When the blood enters with a pressure into arteries the walls will stretch and this enables the arteries to withstand the increase in the pressure, without bursting.
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Knowledge Check

  • An intense stream of water of cross-sectional area A strikes a wall at an angle theta with the normal to the wall returns back elastically. If the density of water is rho and its velocity is v, then the force exerted in the wall will be

    A
    `2 A v^(2) rho cos theta`
    B
    `Av^(2) rho cos theta`
    C
    `2 A v^(2) cos theta`
    D
    `2 A v rho`

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