A Hollow Steel Ball of Diameter 3

question 30

Multiple Choice

A hollow steel ball of diameter 3.0 m barely floats in water.What is the thickness of the wall of the ball? The density of iron is 7.87 g/cm³ and that of water is 1000 kg/m³.

• A) 6.6 cm
• B) 37 cm
• C) 131 cm
• D) 79 cm

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