1. Llyn Cau in Snowdonia, Wales, is a 35.0-m deep glacial lake popular among outdoor swimmers. (a) Calculate the absolute pressure at the bottom of Llyn Cau. Assume the water density is 1.00 x 10° kg/m³ and the ambient air pressure is 9.10 x 10* Pa. (b) An underwater vehicle rests on the bottom of the lake. Find the force exerted by the water on the vehicle's circular, 25.0-cm diameter window 2. Piston 1 in (see the figure below) has a diameter of 0.25 in.: piston 2 has a diameter of 1.5 in. In the absence of friction, determine the force F (in Newton) necessary to support the 500 lb weight 4.45 N = 1 Ibf (weight) 500 lb 20 in -10 in- 3A table-tennis ball has a diameter of 0.015 m and average density of 60 . a. Will it float or sink? Why? (Max of 3 sentences) b. Based from your answer on letter a, what force is required to hold it completely submerged under water? (table- tennis ball is a sphere, density of water = 997 kg/m)

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Fluid Pressure

The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.

Gauge Pressure

Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.