Science Chapter 13.3 Def./Sentences

Archimedes' Principal

The buoyant force of an object is equal to the weight of the fluid displaced by the object.

This property is the ratio of an object's mass to its volume, often expressed in g/cm3

Weight

These two forces act on every object in a fluid.

Weight and Density

An object will either float or be suspended when the buoyant force is equal to this.

weight

Circle the letter of each sentence that is true about buoyancy. a. Forces pushing up on a submerged object are greater than the forces pushing down on it. b. Forces acting on the sides of a submerged object cancel each other out. c. Gravitational forces work together with buoyant forces. d. The net buoyant force is non-vertical

B. Forces acting on the sides of a submerged object cancel each other out.

How is a heavy steel ship able to float? a. Because the density of steel is 7.8 g/cm3 b. The ship's shape enables it to displace a large volume of water. c. Because the density of water is 1 g/cm3 d. The ship's effective density is greater than that of water.

B. The ship's shape enables it to displace a large volume of water.

According to Archimedes' principle, the weight of fluid displaced by a floating object is equal to the _____ acting on that object.

Buoyant Force

This force is equal to the force of gravity that acts on a floating object.

Buoyant force

Circle the letter of the correct answer. In which direction does a buoyant force act? a. in the direction of gravity b. perpendicular to gravity c. in the direction opposite of gravity d. from above the fluid

C

When this property is greater for an object than for the fluid it is in, the object sinks.

Density

Is the following sentence true or false? The greater a fluid's density, the greater its buoyant force.

False

Buoyancy causes an apparent _______ of weight of an object immersed in a fluid.

Loss

Buoyancy

The ability of a fluid to exert an upward force on an object placed in/on it.

What is buoyancy?

The ability of a fluid to exert an upward force on an object placed in/on it.

Buoyant Force

The upward force that acts opposite of the direction of gravity.

Is the following sentence true or false? When an object floats partially submerged in a fluid, it displaces a volume of fluid equal to its own volume.

True