Density and Buoyancy Review

If a ping pong ball floats in water, what can we infer about its density compared to water?

• The ping pong ball is less dense than water.

• The ping pong ball is more dense than water.

• The ping pong ball has the same density as water.

• The density of the ping pong ball is variable.

What is buoyancy?

• The downward force exerted by a fluid on an object.

• The upward force exerted by a fluid that opposes the weight of an object immersed in it.

• The resistance of an object to being submerged in a fluid.

• The weight of an object when it is in a fluid.

What is the relationship between mass and volume in terms of density?

• Density is directly proportional to mass and inversely proportional to volume.

• Density is directly proportional to volume and inversely proportional to mass.

• Density is independent of mass and volume.

• Density is equal to mass plus volume.

What is the unit of measurement for density?

• grams per cubic centimeter (g/cm³)

• liters per square meter (L/m²)

• meters per cubic liter (m/L³)

• pounds per cubic inch (lb/in³)

How does adding cargo to a cargo ship affect its density?

• Adding cargo decreases the mass of the ship, which decreases its density.

• Adding cargo increases the mass of the ship, which increases its density.

• Adding cargo has no effect on the mass of the ship, thus no effect on its density.

• Adding cargo only affects the volume of the ship, not its density.

What is positive buoyancy?

• Positive buoyancy occurs when an object is less dense than the fluid it is in, causing it to float.

• Positive buoyancy occurs when an object is denser than the fluid it is in, causing it to sink.

• Positive buoyancy is the ability of an object to remain submerged in a fluid without floating or sinking.

• Positive buoyancy is when an object is equal in density to the fluid, resulting in neutral buoyancy.

What is the effect of temperature on the density of liquids?

• Generally, as temperature increases, the density of liquids decreases.

• Generally, as temperature increases, the density of liquids increases.

• Temperature has no effect on the density of liquids.

• The density of liquids fluctuates randomly with temperature.

What does it mean for an object to be neutrally buoyant?

• An object sinks to the bottom of the fluid.

• An object floats on the surface of the fluid.

• An object is neutrally buoyant when it neither sinks nor floats, meaning its density is equal to the density of the fluid.

• An object is neutrally buoyant when it is heavier than the fluid.

How does density affect buoyancy?

• An object will float in a fluid if it is less dense than the fluid.

• An object will always float regardless of its density.

• An object will sink in a fluid if it is less dense than the fluid.

• An object will float only if it is more dense than the fluid.

What is the formula for calculating density?

• Density = Mass + Volume

• Density = Mass - Volume

• Density = Mass / Volume

• Density = Mass * Volume