A boy carries a fish in one hand and a bucket (not full) of water in the other hand. If he places the fish in the bucket the weight now carried by him (assume that water does not spill):

One end of light inelastic string is tied to a helium filled balloon and its other end is tied to bottom of a water filled container at point $O.$ The container lies on a fixed horizontal surface and is pulled horizontally towards right with constant horizontal acceleration of magnitude $a$.  Assuming no relative motion of balloon and water with respect to container, the string will be inclined with vertical line passing through $O$ by an angle. ($g$ is acceleration due to gravity)

Figure shows a closed container completely filled with an ideal liquid of density $\rho$. In the liquid there is a spherical body of volume $V$ and density $\sigma$ attached to a string whose other end is attached to the roof of the container. The container is accelerating with an acceleration '$a$' towards right. The magnitude of force exerted by the liquid on the spherical body when it is in equilibrium with respect to the liquid, will be

A fixed container is filled with a liquid of density $\rho$ up to a height $4 \mathrm{m}$. A horizontal slit of small width but of area $=0.5 {\mathrm{m}}^2$ is made at a height of $2 \mathrm{m}$ from bottom. The speed of top surface of the water level is (area of top surface of container is $4 {\mathrm{m}}^2$ and $g=10 \mathrm{m} {\mathrm{s}}^{-2}$) :

Bantu slips into a large lake and he doesn't know swimming but he is a great fan of Superman, he shouted for help remembering Superman. As usual Superman arrives on the top of a cliff and due to some reason Superman lost his flying power immediately after arrival on cliff. Due to shortage of time somehow Superman manages a strong and long straw and decided to drink whole water of lake to save Bantu.(Data: $\mathrm{Atmospheric} \mathrm{pressure}=1.2\times {10}^5 \mathrm{Pa}, g=10 \mathrm{m} {\mathrm{s}}^{-2},$  $\mathrm{density} \mathrm{of} \mathrm{water}=1000 \mathrm{kg} {\mathrm{m}}^{-3}$ ) Assume Superman has infinite power and ability to drink whole water which of the following statements is/are true.
(1) Superman cannot save Bantu by this way.
(2) Superman can drink some water but not whole water.
(3) Superman will save Bantu by drinking whole water.