A glass beaker of mass m is at rest on a horizontal surface. The base of the beaker is a circle with a radius r.

1. (a)The beaker exerts a pressure on the horizontal surface. Determine an expression for the pressure in terms of the gravitational field strength g, m and r. pressure = .................................................................[2]
2. (b)Fig. 2.1 shows the beaker being filled with a liquid from container X. [Figure 2.1] Initially, the beaker is empty. At time t = 0, the tap is opened and liquid from container X flows slowly into the beaker at a constant rate. At time t = T, the liquid stops flowing into the beaker. Sketch on Fig. 2.2 to show how the pressure exerted on the horizontal surface varies between t = 0 and t = 2T. [Figure 2.2][3]

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