Give reason why mercury does not wet glass.
Give reason why mercury does not wet glass.
The cohesive forces among the molecules of mercury are stronger, while the adhesive force between the molecules of mercury and glass are weak. Hence mercury does not stick and wet to glass surface.
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A plane is in level flight at constant speed and each of its two wings has an area of $40 \mathrm{~m}^2$. If the speed of the air is $180 \mathrm{~km} / \mathrm{h}$ over the lower wing surface and $252 \mathrm{~km} / \mathrm{h}$ over the upper wing surface, the mass of the plane is______ $\mathrm{kg}$. (Take air density to be $1 \mathrm{~kg} \mathrm{~m}^{-3}$ and $\mathrm{g}=10 \mathrm{~ms}^{-2}$ )
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- [JEE MAIN 2024]
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Which fundamental law forms the basis of Bernoullis equation ?
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- [AIIMS 2013]