PHY 701.5 Relative Density Application

Substances having relative density _______ than 1 sink

in water.

If the relative density of a substance is less than 1, it will ______ on

water.

The density of seawater is ______ than that of freshwater, a ship

sinks ______ in seawater.

Why does a submarine made of iron float on water whereas an iron nail sink in

water?

• (a) The weight of the submarine is less than the upthrust.

• (b) The weight of the submarine is greater than the upthrust.

• (c) The mass of the submarine is less than the downthrust.

• ( d) The mass of the submarine is greater than the downthrust.

An object floats only if the weight of the water displaced by the object is ......... to its weight.

The iron ball sinks in water because its relative density is _____ than 1.

All things that are less dense will _______ on top of things that are

denser.

To make an object float, we have to consider the following factors: (Choose all the correct answers.)

• shape

• weight

• volume

• density

To make an object float, scientists rely on 2 scientific principles: d................ and b......................

If the density of a material is less than the density of water, it will..........

• (a) float

• (b) sink

• (c) None of these