21. An irregularly shaped object weighs 10.0 N in air, but 4.00 N when submerged in water. What is the density of the object? Ans. 1.67 x 10³ kg/m³
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.
![41. A container of cross-sectional area equal to 1.00 cm² (1.00 x 104 m²) holds a liquid of
density 2.00 g/cm³ (2 x 10³ kg/m³) reaching a height of 6.00 cm (0.0600 m) above a hole
of area 1.00 cm² (1.00 x 104 m²) on the side of the container. a) Find the speed of the
fluid as it leaves the hole. b) Find the flow rate. [Note. Use 997 kg/m³ as the density of
water.]
Ans. a. 1.08 m/sec b. 1.08 x 10
m³/sec](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4d4f45f0-6f0b-4cb6-9f2e-05d769dd18ce%2Fbec159b3-7c21-4c40-8575-82a34a94eeaa%2Fzmt4fl3_processed.jpeg&w=3840&q=75)
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