When an air bubble rises from the bottom of a deep lake to a point just below the water surface, the pressure of air inside the bubble
A
is greater than the pressure outside it
B
is less than the pressure outside it
C
decreases as the bubble moves up
D$B$ and $C$ both
Medium
Download our app for free and get started
D$B$ and $C$ both
d When bubble is deep down it has atmosphere pressure and water pressure i.e. $P_{o}+h \rho g$ As it rises, water pressure which is proportional to the depth, reduces and becomes $P_{o}$ just below the water surface Hence option $'D'$ is correct and $\mathrm{'C'}$ is incorrect. Pressure inside a bubble is always greater than the outside pressure by the amount of excess pressure. Outside pressure and pressure due to surface tension has to be compensated by the inside pressure for stable shape of the bubble. Hence option$'A'$ is correct and $'B'$ is incorrect.
Download our app
and get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
There is a circular tube in a vertical plane. Two liquids which do not mix and of densities $d_1$ and $d_2$ are filled in the tube. Each liquid subtends $90^o$ angle at centre. Radius joining their interface makes an angle $\alpha$ with vertical. Ratio $\frac{{{d_1}}}{{{d_2}}}$ is
The pressure at the bottom of a water tank is $4 P$. where $P$ is atmospheric pressure. If water is drawn out till the water level decreases by $\frac{3}{5}$ th, then pressure at the bottom of the tank is .........
A hydraulic press can lift $100\, kg$ when a mass $'m'$ is placed on the smaller piston. It can lift ......... $kg$ when the diameter of the larger piston is increased by $4$ times and that of the smaller piston is decreased by $4$ times keeping the same mass $'m'$ on the smaller piston.
The pressure of water in a water pipe when tap is opened and closed is respectively $3 \times 10^5\,N/m^2$ and $3.5 \times 10^5\,N/m^2$ . With open tap, the velocity of water flowing is ........... $m/s$
A slender homogeneous rod of length $2L$ floats partly immersed in water, being supported by a string fastened to one of its ends, as shown. The specific gravity of the rod is $0.75$. The length of rod that extends out of water is :
Two immiscible liquids $A$ and $B$ are kept in an U-tube. If the density of liquid $A$ is smaller than the density of liquid $B$, then the equilibrium situation is
In the diagram shown, the difference in the two tubes of the manometer is $5\, \ cm$, the cross section of the tube at $A$ and $B$ is $6\, mm^2$ and $10\, mm^2$ respectively. The rate at which water flows through the tube is $........ cc/s$
$(g\, = 10\, ms^{-2})$