Static Fluids

What do we call the the amount of force exerted on a certain area?

• fluid

• pressure

• buoyant force

• normal force

Water pressure increases as depth increases. 

• True
• False

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS2-4

When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. This fact is called________.

• Pascal's Principle
• Newton's Principle
• Archimedes' Principle
• Bernoulli's Principle

Archimedes' Principle states that... 

• The buoyant force acting on an object equals the volume of the fluid displaced by the object. 
• The buoyant force acting on an object equals the weight (force of gravity) of the fluid displaced by the object.
• The buoyant force acting on an object will always be equal. 

Why is it necessary to mention the temperature at which specific gravity is calculated?

• Volume of the substance changes with temperature.

• Density of the substance changes with temperature.

• Viscosity of the substance changes with temperature.

• Mass of the substance changes with temperature.

Which of the following is TRUE about the specific gravity of a certain substance or object?

• When the specific gravity is greater than one, the substance / object will sink.

• When the specific gravity of the substance is greater than the water, the substance will float.

• When the specific gravity is equal to one, this means that the object will either sink or float.

• When the specific gravity is greater than one, this means that the object will neither sink nor float.

The density of a substance is 1.63 g/mL. What is the mass of 0.25 liters of the substance in grams?

• 704.5 grams

• 0.407 grams

• 407.5 grams

• 40.75 grams

The specific gravity of ice is 0.92. What is the density of ice, and is it greater or less than the density of liquid water at 4.0°C ?

• The density of ice is 920 $\frac{kg}{m^3}$ which is less than the density of liquid water.

• The density of ice is 1030 $\frac{kg}{m^3}$ which is greater than the density of liquid water.

• The density of ice is 1000 $\frac{kg}{m^3}$ which is equal to the density of liquid water.

• The density of ice is 920 $\frac{kg}{m^3}$ which is greater than the density of liquid water.

An ice cube of density 0.9 g/cm³ floats in seawater of density 1.30 g/cm³. Which of the following statements is correct?

• 93 % of the volume of ice cube will be submerged beneath the surface of the seawater.

• 69 % of the volume of ice cube will float above the surface of the seawater.

• 69 % of the volume of ice cube will be submerged beneath the surface of the seawater.

• 31 % of the volume of ice cube will be submerged beneath the surface of the seawater.

An object weighs 500 N.  It displaces 150 N of water.  While in water, the object's weight is

• 500 N
• 650 N
• .33 N
• 350 N

Tags

NGSS.MS-PS2-2