1. The area of the body of a man is about 2.5 m^2. Find the force exerted on him by earth’s atmosphere when he is at an altitude of 50 m 2. A rod 0.5 m long floats vertically in a liquid with 0.3 m above the surface. What is the density of the rod if the relative density of the liquid is 1.2?

3. A horizontal pipe with a cross-sectional area of 8.6 cm^2 has a constriction with a cross-sectional area of 2.6 cm^2. Water is flowing through the pipe with a speed of 3.5 m/s where the pressure is 70 cm Hg. Find the (a) speed and (b) pressure in the constriction.

4. A horizontal stream of water leaves an opening on the side of a tank filled with water to a height of 4.0 m. If the opening is 1.0 m above the ground, find (a) the speed of water through the opening and (b) the horizontal distance the water will strike the ground starting from the base of the tank