buoyancy

Buoyancy is best described as

• the force which allows that would normally sink to float

• a force which pulls objects toward the center of the earth

• mass minus volume

• a lifeboat

Answer explanation

Aerogel is so buoyant it could carry about 1000 grams of cargo!!!

The best example of buoyancy is a

• ship

• plane

• the ocean

• Jon Osloff

Answer explanation

Density is the measure of how much matter is found in

• water

• cubic millimeter of volume

• L X W X H

• cubic centimeter of volume

Answer explanation

Water has a density of

• cannot be determined

• 1.0grams/cm3

• 10grams/cm3

• 1 gram

Answer explanation

The formula for Density is

• Mass/Length

• Mass/Volume

• Volume/Mass

• 2(Density -1gram/cm3)

Answer explanation

How do you get a chunk of dense metal to float instead of sink

• Nothing, you cannot change the shape

• add a less dense metal to the original metal

• Increase the volume of the metal by flattening its shape

• compress the metal

Answer explanation

Archimede's Principle is

• Mass of the water is less than the force of buoyancy

• the mass of water displaced by the volume of a boat is equal to to the force of buoyancy which pushes upward on the boat causing it to float

• the volume of water which displaces the buoyancy causing the boat to float

• Outdated and not used in science anymore

Who was Archimedes?

• 2020 Presidential candidate

• Scientist and mathematician who lived in the 200BC

• Scientist who discovered gravity in Italy

• Ship captain

Answer explanation

when building a ship, its important to consider the weight of the _____________ when deciding its density.

• bow

• surrounding water

• cargo and building material

• weight of the captain

practical uses where the concept of density helps people separate substances are

• using a centrifuge with blood

• weighing yourself on a scale

• panning for gold

• fishing

Answer explanation