The density of the marble is less than that of water (1g/cm³), the marble is going to float.
What is density?
Density is given by:
Density = mass / volume
The mass of the marble is 9g and the radius is 1.4 cm.
Volume of marble = (4/3)π * radius³ = (4/3)π * (1.4)³ = 11.49 cm³
Density of marble = 9g / 11.49 cm³ = 0.78 g/cm³
Since the density of the marble is less than that of water (1g/cm³), the marble is going to float.
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