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
Explain why To keep a piece of paper horizontal, you should blow over, not under, it
Explain why A spinning cricket ball in air does not follow a parabolic trajectory
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.
A Gipsy car has a canvass top. When the car runs at high speed, the top bulges out. Explain.
Bernoulli's theorem is based on the conservation of
Water is flowing through a long horizontal tube. Let PA and PB be the pressures at two points A and B of the tube.
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.
When one end of the capillary is dipped in water, the height of water column is 'h'. The upward force of 119 dyne due to surface tension is balanced by the force due to the weight of water column. The inner circumference of the capillary is (Surface tension of water= 7 x 10-2 N/m) ____________.
The working of venturimeter is based on ______.
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.
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.
