Task 69 A round hole of radius R = 20cm in the bottom of the water tank is blocked by a hemisphere valve of the same radius (Fig. 1.39) whose weight is G = 200H. Calculate a) the force T required to lift the valve at pressure H, if the pressure on the free surface is Rm
H = 2.5m, R = 0.2m, G = 200H, Rm = 150 kPa

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