1. Oil of density .7 g/cm3 is held in a large container, 20m off the ground and filled to a height of 2 m, flows into a 1 cm diameter tube during a hole in the bottom of the container. Estimate the speed at which the oil flows out of the tube at ground level.
a) 7 m/s b)7cm/s c) 21 m/s d) 21 cm/s
2. A square wooden raft sinks halfway into the water unloaded and sinks all the way into the water without sinking when carrying a load of 200 kg. Discover the mass of the raft?
a) 100 kg b) 200kg c) 400 kg d) 980 kg