Pressure & Density

Question 1

What is Pressure?

Answer 1

It’s the force applied perpendicularly over a certain area.

Question 2

What is the formula for pressure?

Answer 2

Pressure = Force / Area

Question 3

What is the unit for pressure?

Answer 3

Newtons/size unit ²/³

E.g
N/cm²
N/m³

Question 4

Give a few examples of objects with high pressure.

Answer 4

High Heels
Knife
Nail
Bullet
Arrow
Needle
Scalpel
Fork
Pencil

Question 5

Name a few examples of objects with low pressure.

Answer 5

Skis
Blunt Knife
Shoes
Surf Board
Tank
Tractor Wheels
Mattress

Question 6

What is Density?

Answer 6

It’s the amount of matter(mass) in a certain area(Volume).

Question 7

What’s the formula for calculating Density?

Answer 7

Density = Mass / Volume

Question 8

How do you find the Density of a Regular Shaped Object?

Answer 8

Measure the Height, Width & Length of the object
Calculate the volume of the object
Measure the mass of the object 
Divide the mass by the Volume
Density = Mass(g) / Volume(cm³)

Question 9

How do you find the density of an irregular object?

Answer 9

It’s the same as with a regular object
If you want to find the volume you have to use the displacement method
Fill a measuring cylinder to 10cm³. Place your object into the water. Take away 10cm³ from the new volume. The number left over is the volume of the irregular object.