Advertisements
Advertisements
प्रश्न
Suppose the tube in the previous problem is kept vertical with A upward but the other conditions remain the same. the separation between the cross sections at A and B is 15/16 cm. Repeat parts (a), (b) and (c) of the previous problem. Take g = 10 m/s2.
Advertisements
उत्तर
Given:
Separation between the cross sections at A and B = 15/16 cm
Speed of water at A, vA = 25 cm/s
Speed of water at B, vB = 50 cm/s
(c) By Bernoulli's equation, we get:
`1/2pv_A^2+ρgh_A+P_A=1/2pv_B^2+ρgh_B+P_B`
`=>P_A-P_B=(1/2)p(v_B^2-v_A^2)+pg(h_B-h_A) [h_A-h_B=(15/16)cm]`
`=>P_A-P_B=1/2(2500-625)-1000×15/16`
= 0
APPEARS IN
संबंधित प्रश्न
Fill in the blanks using the word(s) from the list appended with each statement
For the model of a plane in a wind tunnel, turbulence occurs at a ... speed for turbulence for an actual plane (greater / smaller)
Can Bernoulli’s equation be used to describe the flow of water through a rapid in a river? Explain.
In a test experiment on a model aeroplane in a wind tunnel, the flow speeds on the upper and lower surfaces of the wing are 70 m s–1and 63 m s–1 respectively. What is the lift on the wing if its area is 2.5 m2? Take the density of air to be 1.3 kg m–3.
The cylindrical tube of a spray pump has a cross-section of 8.0 cm2 one end of which has 40 fine holes each of diameter 1.0 mm. If the liquid flow inside the tube is 1.5 m min–1, what is the speed of ejection of the liquid through the holes?
A Gipsy car has a canvass top. When the car runs at high speed, the top bulges out. Explain.
Water is flowing through a long horizontal tube. Let PA and PB be the pressures at two points A and B of the tube.
A large cylindrical tank has a hole of area A at its bottom. Water is poured in the tank by a tube of equal cross-sectional area A ejecting water at the speed v.
Suppose the tube in the previous problem is kept vertical with B upward. Water enters through B at the rate of 1 cm3/s. Repeat parts (a), (b) and (c). Note that the speed decreases as the water falls down.
What is the basis of Bernoulli’s principle?
A large number of liquid drops each of radius 'a' are merged to form a single spherical drop of radius 'b'. The energy released in the process is converted into kinetic energy of the big drop formed. The speed of the big drop is [p = density of liquid, T = surface tension of liquid] ____________.
Dynamic lift caused by spinning is called ______.
If p0 = 1.03 × 105 Nm–2, ρ0 = 1.29 kg m–3 and g = 9.8 ms–2, at what height will the pressure drop to (1/10) the value at the surface of the earth?
In the widest part of the horizontal pipe, oil is flowing at a rate of 2 m/sec. The speed (in m/s) of the flow of oil in the narrow part of the tube if the pressure difference in the broad and narrow parts of the pipe is 0.25 ρoilg, is ______ m/s.
Calculate the velocity with which the liquid gushes out of the 4 cm2 outlet, if the liquid flowing in the tube is water and the liquid in the U tube has a specificity 12. The velocity of the liquid at point A is `sqrt20.2` m/s ______.
Two wires are made of the same material and have the same volume. However wire 1 has cross-sectional area A and wire 2 has cross-sectional area 9A. If the length of wire 1 increases by Δx on applying force F, how much force is needed to stretch wire 2 by the same amount?
A tank is filled with water of density 1 g cm-3 and oil of density 0.9 g cm3. The height of water layer is 100 cm and of the oil layer is 400 cm. If g = 980 cms-2, then the velocity of efflux from an opening in the bottom of the tank is ______.
Explain the working of an atomizer.
