Physics - Materials and Density

Question 1

What is a linear relationship between two quantities?

Answer 1

When the line of best fit is straight

Question 2

What is a non-linear relationship between two qualities?

Answer 2

When the line of best fit is not straight

Question 3

What does a relationship between directly proportional quantities look like?

Answer 3

A straight line through the origin

Question 4

What is spring constant?

Answer 4

The amount of force needed to stretch or compress an object by 1m

Question 5

What is the unit of spring constant?

Answer 5

N/m

Question 6

What is Hooke’s law?

Answer 6

The extension of a material is directly proportional to the force applied up to the limit of proportionality

Question 7

On a force extension graph where can you see the limit of proportionality?

Answer 7

Where the line curves

Question 8

What is elastic deformation?

Answer 8

• An object stretched or compressed will return to its original length when the force is removed
• Up to the limit of proportionality

Question 9

What is inelastic deformation?

Answer 9

• When an object is stretched or compressed it won’t return to its original shape when the force is removed
• Past the limit of proportionality
• Permanent deformation

Question 10

What is uncertainty?

Answer 10

A range in which we expect the real value to lie

Question 11

What are the properties of a solid?

Answer 11

• Definite shape
• Doesn’t flow
• Can’t really be compressed
• Expand a little bit if heated

Question 12

What are properties of liquids?

Answer 12

• No definite shape
• Can flow to take shape of container
• Very difficult to compress

Question 13

What are properties of gases?

Answer 13

• No fixed shape
• Gases diffuse to fill container
• Gases are easily compressed