A Ball Naturally Floats with 35% of Its Volume Above

question 53

Multiple Choice

A ball naturally floats with 35% of its volume above the surface of a pool filled with mercury (density 13,600 kg/m³) . If a force of 1,200 N is required to force the ball completely under water, what is the radius of the ball?

• A) 5.7 cm
• B) 18.3 cm
• C) 14.9 cm
• D) 12.9 cm

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Definitions:

Marginal Social Benefit

The additional benefit to society from the consumption of an additional unit of a good or service.

Public Goods

Goods that are non-excludable and non-rivalrous, meaning that no one can be excluded from their use and one person's use does not reduce availability to others.

Private Benefit

The direct advantage or gain obtained by an individual or firm from their economic activities, without considering the impacts on third parties.

Mosquito Control

A management strategy to regulate or eliminate mosquito populations to reduce their damage to human health, economies, and enjoyment.