The pressure outside the droplet of water of diameter 0.04 mm is 103.2 kPa (atmospheric pressure). Calculate the pressure within the droplet if surface tension is given as 0.0725 N/m of water.

Shown below is the free body diagram of a needle floating in a liquid with surface tension o and density p. Find the expression for the maximum diameter such that the wire will not sink. needle W

A semicircular, hinged gate separates two fluids on either side of a partition. Part (a) of the figure shows the geometry of the gate, and part (b) of the figure shows the whole system in side view. The radius of the gate (4 m) is equal to the height of the fluid on the right side of the gate (fluid 2), and the specific weight ratio of the fluids is γ2/γ1 = 1.5. At what height, h, will thegate just start to open?

The manometer pressure at pipe A is about 30mmHg and the initial differential reading of Mercury is 0.30 m as shown.Calculate the absolute pressure at pipe B.