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Quantities & Derived Quantities Flashcards

(10 cards)

1
Q

What is physics?

A

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

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2
Q

What is a physical quantity?

A

Anything that can be measured!

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

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3
Q

What’s another name for base quantities?

A

Fundamental quantities

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4
Q

What are base quantities?

A

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

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5
Q

How many base quantities are there? Name them!

A
There are 7 
They are 
-mass
-time
-length
-electric current 
-temperaure 
-luminous intensity 
-amount of substance
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6
Q
What is the unit and symbol for the following base quantities?-
mass
lenght
time 
temperature 
electric current 
luminous intensity 
amount of substance
A
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)
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7
Q

What are derived quantities or units?

A

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

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8
Q

True or False

Derived quantities can be measured directly

A

False

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9
Q

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

A
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
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10
Q

What does “Per” mean?

A

Division!

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