Quantities & Derived Quantities

Question 1

What is physics?

Answer 1

A branch of science concerned with the nature and properties of matter and energy.

Question 2

What is a physical quantity?

Answer 2

Anything that can be measured!

Anything that has a numerical magnitude and unit is a physical quantity.

Question 3

What’s another name for base quantities?

Answer 3

Fundamental quantities

Question 4

What are base quantities?

Answer 4

A quantity that cannot be defined or formed in any other physical quantity. It is the foundation.

Question 5

How many base quantities are there? Name them!

Answer 5

There are 7 
They are 
-mass
-time
-length
-electric current 
-temperaure 
-luminous intensity 
-amount of substance

Question 6

What is the unit and symbol for the following base quantities?-
mass
lenght
time 
temperature 
electric current 
luminous intensity 
amount of substance

Answer 6

mass - kilogram (kg) 
length - meter (m)
time - second (s) 
electric current - Ampere/amps (A) 
amount of substance - Mole (mol) 
luminous intensity - Candela (cd) 
temperature - Kelvin (K)

Question 7

What are derived quantities or units?

Answer 7

Quantities formed by combing two or more base quantities by multiplying or dividing only.

Question 8

True or False

Derived quantities can be measured directly

Answer 8

False

Question 9

List 5 derived quantities as well as their derived unit and their base quantity

Answer 9

Volume - m³ (length) 
Acceleration - m/s² (length and time) 
Speed - m/s (length and time) 
Force - kg m s-² (mass, length and time)
Area - m² (length) 
AND MORE

Question 10

What does “Per” mean?

Answer 10

Division!