3.0 and 4.0

Question 1

Viscosity

Answer 1

Resistance of a fluid (liquid or gas) to a change in shape, or movement of neighboring portions relative to one another. Viscosity is a measure of how a fluid flows.

Question 2

Density formula

Answer 2

Mass divided by Volume

Question 3

Density

Answer 3

Density depends on whether the object is…
-Solid
-Filled with air pockets
-or something in between

Question 4

Force is measured in…

Answer 4

Newtons

Question 5

Centre of Buoyancy

Answer 5

The point where the buoyant force is applied or the point on the object.

Question 6

Archimede’s Principle

Answer 6

The buoyant force acting on an object equals the weight (force of gravity) of the fluid displaced by the object.

Ships are designed to float in all types of water, regardless of the density of the water.
Plimsoll Line- which shows how heavily a ship can be loaded in different water conditions.

Question 7

Compressibility

Answer 7

Extent to which a substance (solid, liquid, or gas) can be squeezed by pressure. Gasses ARE compressible because their particles can be squeezed close together into a smaller volume. But because the space between the particles is already so small, liquids and solids are considered incompressible.

Question 8

Pascal’s Law & Formula

Answer 8

Pressure measures the amount of force applied to a certain area.
Pressure is exerted in all directions.
The larger the force, greater pressure
The smaller the force, greater pressure
This principle is used to describe the hydraulic system.
In a fluid at rest in a closed container, a pressure change in one part is transmitted without loss to every portion of the fluid and to the walls of the container.
FORMULA For Pascal’s Law
P1 = P2 (Pressure 1 = Pressure 2)
Calculation of Pressure = F1 divide A1(Force divide by Area)

Question 9

Pressure and Depth

Answer 9

The deeper you go into a liquid or gas, the greater the pressure on you from the surrounding fluid will be.

Question 10

Hydraulics

Answer 10

Hydraulics- is the study of pressure in liquids.
Cranes at a construction site use hydraulic power
- Hydraulics allow machines to transmit force from one point to another using an
- INCOMPRESSIBLE FLUID.
- Hydraulic Press

Question 11

Hydrophobic

Answer 11

Hydrophobic materials do not dissolve in water. Ex / Oil (Meaning afraid of water)

Question 12

Emulsion

Answer 12

A mixture of two or more immiscible (unblendable) liquids.

Question 13

Valves

Answer 13

Valves are devices that regulate the flow of fluids.
Today’s valves can control not only the flow, but the: rate, volume, pressure, or direction of liquids, gasses, slurries or dry materials through a pipeline, chute or similar passageway.

Question 14

Submersible

Answer 14

A deep diving submarine used to explore the ocean. Usually smaller than normal submarines.

Question 15

Describe S.C.U.B.A

Answer 15

Self-Contained Underwater Breathing Apparatus