Density is expressed as:
Three balls with the same volume 1.0 × 10-6 m3 are in m open tank of water that has a density (ρ) equal to 1.0 × 103 kg/m3. The balls are in the water at different levels. Ball 1 floats in water with a part of it above the surface, ball 2 is completely submerged in the water, and ball 3 rests on the bottom of the tank Any movement of the water obeys Bernoulli's equation:
, where P1 and P2 are the pressures at elevations y1 and y2, and v1 and v2 are the speed of the water. (Note: Unless otherwise noted, the water and the balls are stationary).
Assume that the density of ball 1 is 8.0 × 102 kg/m3. Ignoring atmospheric pressure, what fraction of ball 1 is above the surface of the water?
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