Advertisements
Advertisements
Question
What are the energies possessed by a liquid? Write down their equations.
Solution
A liquid in motion possesses the following three types of energy:
(i) Kinetic energy: It is the energy possessed by a liquid by virtue of its motion.
K.E. = `1/2"mv"^2`
K.E. per unit mass = `(1/2"mv"^2)/"m" = "v"^2/2`
(ii) Potential energy: It is the energy possessed by a liquid by virtue of its height above the ground level.
P.E. = mgh
P.E. per unit mass = `"mgh"/"m"` = gh
(iii) Pressure energy: It is the energy possessed by a liquid by virtue of its pressure.
Pressure energy per unit mass = `"P"/("m"/"v")`
APPEARS IN
RELATED QUESTIONS
State Bernoulli’s theorem.
What happens to the pressure inside a soap bubble when air is blown into it?
State the principle and usage of the Venturimeter.
Obtain an equation of continuity for a flow of fluid on the basis of conservation of mass.
State and prove Bernoulli’s theorem for a flow of incompressible, non-viscous, and streamlined flow of fluid.
Describe the construction and working of venturimeter and obtain an equation for the volume of liquid flowing per second through a wider entry of the tube.
The reading of the pressure meter attached with a closed pipe is 5 × 105 Nm−2. On opening the valve of the pipe, the reading of the pressure meter is 4.5 × 105 Nm−2. Calculate the speed of the water flowing in the pipe.
A sniper fires a rifle bullet into a gasoline tank making a hole 53.0 m below the surface of gasoline. The tank was sealed at 3.10 atm. The stored gasoline has a density of 660 kgm−3. The velocity with which gasoline begins to shoot out of the hole is (Take g = 10 m/s2).
