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13 July, 03:12

My Notes As the initially empty urinary bladder fills with urine and expands, its internal pressure increases by 3300 Pa, which triggers the micturition reflex (the feeling of the need to urinate). The drawing shows a horizontal, square section of the bladder wall with an edge length of 0.01 m. Because the bladder is stretched, four tension forces of equal magnitude T act on the square section, one at each edge, and each force is directed at an angle θ below the horizontal. What is the magnitude T of the tension force acting on one edge of the section when the internal bladder pressure is 3300 Pa and each of the four tension forces is directed 5.0° below the horizontal

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  1. 13 July, 04:41
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    T = 0.946 N

    Explanation:

    there are four tension forces making an angle θ where θ = 5.0

    side of the length l = 0.01 m

    Area A = 0.01 * 0.01 m

    = 1.0*10^-4 m^2

    Pressure inside the bladder is P = 3300 Pa

    (3300 Pa) (1.0*10^-4 m^2 = 4 T sin (5.0)

    T = 0.946 N
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