The picture shows the moon's gravitational force acting on the earth's surface. The arrow represents the direction of the force.

1,2,3 and 4 are four different locations on the earth's surface.

Which locations will experience low tide as shown in the picture?

Peter pours the same amount of four different liquids in separate cylinders. The cylinders are of the same size. He then drops a glass marble in each of the four cylinders.

Peter notes the time the marble takes to reach the bottom of each cylinder. The table shows the results.

Which liquid exerted the most upward force on the marble?

Which of the following statement(s) is/are wrong?

A 'U' tube contains oil, carbon tetrachloride and water as shown in the figure. The density of oil is $0.8 \mathrm{g} {\mathrm{cm}}^{-3}$ and that of carbon tetrachloride is$1.6 \mathrm{g} {\mathrm{cm}}^{-3}$. If oil and water surfaces are at the same level, then the height of the water column is 

The students made four holes in the bottle along a vertical line. They put the bottle in a sink. They used water from a tap to keep the bottle filled to the top. The students measured and recorded the vertical heights of the holes above the sink. They also measured the horizontal distances the water landed away from the bottle. A pair of measurements for one of the holes is shown in the diagram.

The complete data from the experiment is shown in the table.

Which hole is shown in the diagram?