A box has a mass of 100 grams and a volume of 20 mL. Will the box sink or float in water? How do you know?

The box will Sink. Its density is higher

Explanation:

Density is the property to know if an object will sink or float in this kind of exercise, as we know the density equation is:

Density = Mass/Volume, d=m/v

In this object the density will be:

D = 100g/20ml = 5g/mL

So, the density is 5g/ml and the density of water is 1g/mL.

If a body has a higher density of water will sink otherwise will float.