Understanding the Law of Flotation

What does the law of flotation state about a floating body?

• It displaces its own weight of the fluid.

• It displaces half its weight of the fluid.

• It displaces its own volume of fluid.

• It displaces twice its weight of the fluid.

Why can't a 1-ton block of solid iron float in water?

• Because it is less dense than water.

• Because it is the same density as water.

• Because it is lighter than water.

• Because it is denser than water.

How does a 10,000-ton ship manage to float?

• By being lighter than water.

• By displacing 10,000 tons of water.

• By having a smaller volume.

• By being denser than water.

What must a dirigible do to hover at a constant altitude?

• Displace more air than its weight.

• Displace less air than its weight.

• Displace exactly its own weight of air.

• Displace twice its weight of air.

What instrument is used to measure the relative density of liquids?

• Hydrometer

• Barometer

• Thermometer

• Anemometer