A Hollow Steel Ball of Diameter 3 M Barely Floats

question 42

Multiple Choice

A hollow steel ball of diameter 3 m barely floats in water.What is the wall thickness of the ball? (ρFe = 7.87 g/cm³)

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

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Definitions:

Manipulated

Altered, controlled, or handled skillfully, often with the implication of unfairness or deceit.

Optimism

A mental attitude characterized by hope and confidence in success and a positive future.

Placebo

A harmless pill, medicine, or procedure prescribed more for the psychological benefit to the patient than for any physiological effect.

Dependent Variable

The variable in an experiment that is expected to change in response to manipulations of the independent variable.