Phy Sci chapter three notes

Question 0

What has to be divided in the formula to get pressure

Answer 0

Force and area

Question 1

The amount of force exerted per unit area of a surface

Answer 1

Pressure

Question 2

The SI unit of pressure; equal to the force of 1N exerted over an area of 1m

Answer 2

Pascal

Question 3

The upward force that keeps an object immersed in or floating on a fluid

Answer 3

Buoyant force

Question 4

What principle is used to find buoyant force

Answer 4

Archimedes

Question 5

What does Pascal’s principle state

Answer 5

if the pressure in a container is increased at any point, the pressure increases at all points by the same amount

Question 6

What is based on Pascal’s principle

Answer 6

Hydraulic devices

Question 7

What does viscosity depend on

Answer 7

Particle attraction

Question 8

What is the resistance of a gas or liquid to flow

Answer 8

Viscosity

Question 9

What makes up matter

Answer 9

Atoms and molecules that are always in motion

Question 10

What is the relationship between temperature of a substance and the particles in that substance

Answer 10

The higher the temperature, the faster the particles move

Question 11

A nonsolid state of matter in which the atoms or molecules are free to move past each other, as in a gas or liquid

Answer 11

Fluid

Question 12

A state of matter that consists of free-moving ions and electrons

Answer 12

Plasma

Question 13

The capacity to do work

Answer 13

Energy

Question 14

What is the measure of average kinetic energy

Answer 14

Temperature

Question 15

A measure of how hot or cold something is

A measure of the average kinetic energy of the particles in an object

Answer 15

Temperature

Question 16

The total kinetic energy of a substance’s atoms

Answer 16

Thermal energy

Question 17

What happens when a substance changes from one state of matter to another?

Answer 17

The identity of a substance does not change during a change of state
The energy of a substance does change

Question 18

What changes of state require energy

Answer 18

Melting
Evaporation
Sublimation

Question 19

What changes of state release energy

Answer 19

Freezing

Condensation

Question 20

What happens to mass no energy during physical and chemical changes

Answer 20

Mass and energy are both conserved

Neither mass nor energy can be created or destroyed

Question 21

What is the law of conservation of mass

Answer 21

In chemical changes, as well as in physical changes, the total mass of the substances undergoing the change stays the same before and after the change

Question 22

What is the law of conservation of energy

Answer 22

Energy may be changed to another form during a physical others chemical change, but the total amount of energy present before and after the change is the same

Question 23

What are some properties of gases

Answer 23

Gases expand to fill their containers
They spread out easily and mix with one another
They have low densities and are compressible
They are mostly empty space, unlike solids and liquids
Gases exert pressure on their containers

Question 24

The laws that state the mathematical relationship between the volume, pressure, temperature, and quantity of a gas

Answer 24

Gas laws

Question 25

What 2 things does Boyle’s law relate

Answer 25

Pressure of a gas to its volume

Question 26

What is Boyle’s law?

Answer 26

The volume of a gas increases as the pressure decreases and vice versa

Question 27

What is the formula for Boyle’s law

Answer 27

P1V1 = P2V2

Question 28

What two things does Gay-Lussac’s law relate

Answer 28

Gas pressure to temperature

Question 29

What is Gay-Lussac’s law

Answer 29

The pressure of a gas increases as the temperature increases and vice versa

Question 30

What 2 things does Charles’s law relate

Answer 30

Temperature to volume

Question 31

What is Charles’s law

Answer 31

The volume of the gas increases and the gas’s temperature increases and vice versa