Physics

Question 1

Why do we need to know concepts of physics for hearing science?

Answer 1

Because physics explains how sound behaves, is generated, is processed as it travels through the auditory system, is processed by electrical and digital devices, and the physical properties of sound

Question 2

What are the three most important terms to understand for physics?

Answer 2

Mass, density, and elasticity

Question 3

What is mass?

Answer 3

How much matter a substance or object has

Question 4

Why is mass not the same as weight?

Answer 4

Weight is the force of gravity on an object

Question 5

Why is mass important to study for hearing science?

Answer 5

Mass influences how sound is produced and processed

Question 6

What is density?

Answer 6

The amount of matter in a given unit of volume

Question 7

Why is density important to study for hearing science?

Answer 7

Density effects sound transmission

Question 8

What is elasticity?

Answer 8

The property of matter that allows it to return to its original state after it has been disturbed

Question 9

Why is elasticity important to study for hearing science?

Answer 9

Elasticity looks at how sound is generated and travels

Question 10

What is displacement?

Answer 10

The length between point A and point B

Question 11

What is the difference between displacement and distance?

Answer 11

Distance varies more than displacement. Displacement is a certain straight shot

Question 12

What is velocity?

Answer 12

A rate of change in displacement. Speed + direction

Question 13

What is acceleration?

Answer 13

A rate of change in velocity

Question 14

How is speed different from velocity and acceleration?

Answer 14

Speed is how fast something is moving, where velocity and acceleration are rates of change in speed and direction. Speed also varies, where velocity is constant

Question 15

What is force?

Answer 15

The interaction between two objects or between an object and its environment

Question 16

Provide an example of Newton’s first law of motion.

Answer 16

Pushing a ball, the ball will continue to move

Question 17

Why does it take a force to accelerate an object?

Answer 17

Objects have mass so it takes force to accelerate an object

Question 18

Provide an example of Newton’s second of law of motion.

Answer 18

Pushing a couch needs more force since it tends to have equal/more mass as an average person

Question 19

Force is determined by what two factors?

Answer 19

Mass and acceleration

Question 20

How do different masses influence force applied to accelerate an object?

Answer 20

The less mass= less force needed to accelerate the object. The more mass= more force needed to accelerate the object

Question 21

How is acceleration of an object already in motion influenced by force?

Answer 21

Acceleration increased when more force is applied and vice versa

Question 22

What does it mean to say that the first two laws express the idea that force is required to change the motion of an object?

Answer 22

Newton’s first law states that force is required to change the motion of an object, where Newton’s second law states how much force is required to cause acceleration

Question 23

Provide an example of Newton’s third law of motion.

Answer 23

Pulling back a tree branch, the tree branch will come back towards you

Question 24

What is equilibrium?

Answer 24

The state of balance or stability where an object’s state of motion does not change over time

Question 25

Does equilibrium mean that there is zero force? Why or why not?

Answer 25

No, the net force is zero because the opposing forces are equal

Question 26

What is the law of Universal Gravitation?

Answer 26

Every object in the universe attracts every other object with a force directed toward its center and that is proportional to the product of their masses and inversely proportional to the square of the distance between them?

Question 27

What is gravity?

Answer 27

The universal phenomenon in which any two objects in the universe attract each other

Question 28

What is gravity dependent on?

Answer 28

The mass of the object and the distance between them

Question 29

What is the relationship between gravity, mass, and distance?

Answer 29

Mass and gravity are directly related, where distance and gravity are inversely related

Question 30

Why do things fall to the ground?

Answer 30

The gravitational pull of the earth's core

Question 31

What is weight?

Answer 31

The force of gravity acting on an object

Question 32

What is momentum?

Answer 32

The product of mass and velocity

Question 33

What must be applied to change momentum?

Answer 33

Force

Question 34

What is the law of conservation of momentum?

Answer 34

That the total momentum of things in the universe will never change unless acted upon by an outside force

Question 35

How does the law of conservation of momentum apply when two objects collide?

Answer 35

The momentum before has to equal the momentum after

Question 36

What is energy?

Answer 36

The ability or capacity to do work

Question 37

What is the relationship between energy and work?

Answer 37

Energy is stored for future work. Active work is used energy

Question 38

What two categories are energy classified into?

Answer 38

Potential and kinetic

Question 39

What is the difference between the two classifications of energy?

Answer 39

Potential energy is any object at rest that is storing energy to use. Kinetic energy is active energy in use

Question 40

What is the law of conservation of energy?

Answer 40

That energy can change from one form to another but cannot be created or destroyed

Question 41

Is energy lost or converted into another form of energy?

Answer 41

Converted into another form of energy

Question 42

Provide an example of conservation of energy.

Answer 42

Rubbing hands together creates mechanical energy, which becomes heat/ thermal energy

Question 43

What is power?

Answer 43

The rate at which a system is gaining or losing energy

Question 44

What is the relationship between power and work?

Answer 44

Power and work are directly related

Question 45

Power of mechanical system is the product of what?

Answer 45

Force and velocity acting on a system

Question 46

Please explain how mass and stiffness (elasticity) play a role in sound generation and sound propagation (travel).

Answer 46

Mass and stiffness determine sound's ability to travel. The more mass an object has, the slower sound travels. The more stiffness an object has, the faster sound travels

Question 47

Which law of motion essentially defines inertia? Please define inertia and explain how it can occur in two states. Identify the two states in the answer.

Answer 47

Newton's first law. Inertia is when an object resists change. Inertia is a change in rest or motion.