The temperature of an air bubble while rising from bottom to surface of a lake remains constant but its diameter is doubled if the pressure on the surface is equal to h meter of mercury column and relative density of mercury is p then the depth of lake in metre is
The pressure of water at bottom in a lake is 3/2 times that at half depth where the water barometer reads $10$ m. The depth of the lake is:
Two communicating vessels contain mercury. The diameter of one vessel is four times larger than the diameter of the other. A column of water of height $h _0=70$ cm is poured into the left hand vessel (the narrower one). How much will be mercury level rise in the right hand vessel? ( Specific density of mercury= $13.6$)
The height of mercury $(h)$ in the manometer is
8 gm $O _{2}$,14 gm $N _{2}$ and 22 gm $CO _{2}$ is mixed in a container of 10 litre capacity at $27^oC$.The pressure exerted by the mixture in terms of atmospheric pressure will be-
Suppose the density of air at Hyderabad is $\rho _ { 0 }$ and atmospheric pressure is $P _ { \mathrm { atm } }$.Suppose we wish to calculate the pressure $P$ at a height $10 \mathrm { km }$ above Hyderabad. If we use the equation $P _ { 0 } - P = \rho g z$ to calculate $P$ with $z = 10 km$. But if we take only variation of $\rho$ with height we get $P _1$. if we take only of $g$ with height we get $P _2$, if we take both $\rho$ and $g$ variations with height we get $P _3$. Then
An air bubble doubles its radius on rising from the bottom of water reservoir to the surface of water in it. If the atmospheric pressure is equal to $10 m $ of water, the height of water in the reservation s-
A cubical block of steel each side '$\ell $' is floating in mercury in a vessel. The densities of steel and mercury are ${ p } _{ s }\quad and\quad { p } _{ m }$ .The height of block above the mercury level is given by.
A flask of volume $10^3cc$ is completely filled with mercury at $0^oC.$ The co-efficient of cubical expansion of mercury is $180\times10^{-6} /^oC$ at that of glass is $40\times10^{-6}/^oC.$ If flask is placed in boiling water at $100^oC,$ how much mercury will overflow
Positive and negative ions are produced in the atmosphere due to cosmic rays from space and also due to radioactive element in the soil . in some region in the atmosphere the electric field strength is 100 V/m in the vertically downwaeds direction. This field exerts force on the positive and negative ions in the given region in atmosphere . as a result, positive ions , having a density $ 500/cm^3 $ drift downward while negative ions , havig a density $ 300/cm^3 $ drift upward al these ions are singly charged. it is observed that the conductivity in the given region is $ 4 \times 10^{-13} $ $ (\Omega -m)^{-1} $ . find the average speed of ions, assuming it to be the same for positive and negative ions.