Question

The density of water is 1 gram per cubic centimeter. A more dense object will sink, and a less dense object will float.

Will a marble with a radius of 1.4 cm and a mass of 9 grams sink or float in water?

The marble will
because the density of the marble is about
grams per cubic centimeter.

Answer 1

The marble will float because the density of the marble is about 0.78 grams per cubic centimeter.

Calculation: V = (4/3)π(1.4 cm)^3 ≈ 11.49 cm^3, so density = 9 g / 11.49 cm^3 ≈ 0.78 g/cm^3 (< 1 g/cm^3).