Question 4 a) Determine the rise in water level h as a result of surface tension between two glass surfaces of length I = 12 cm spaced d = 0.3mm apart with contact angle 0 = 3.6 degrees. 1 = 12cm b) If the distance between the two glass surfaces remained unchanged and the length of the glass surfaces decreased to I = 10cm, would the rise in water level h change or remain constant?

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A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?