equations and formulae Equations and formulae are used in Physics Chemistry and Biology Sometimes you will need to rearrange them to work something out To rearrange them you need to understand what they mean ID: 498609
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Slide1
Numeracy in Science – Rearranging
equations and formulae
Equations and formulae are used in Physics, Chemistry and Biology. Sometimes you will need to rearrange them to work something out.To rearrange them, you need to understand what they mean.The formula for calculating speed is shown on the right. What does it mean?
A
B
C
D
Experiment to measure the speed of an objectSlide2
Numeracy in Science – Rearranging
equations and formulae
You rearrange an equation when what you want to work out is not the subject. In the equation below, “power” is the subject. If I wanted to work out “voltage” or “current”, I would need to rearrange it.A
B
C
D
Experiment to measure the current in an electrical circuit and the voltage across resistors
What calculation do you think you would need to do to work out the voltage? (Remember, dividing is the reverse of multiplying).Slide3
T
he formula for calculating speed is shown on the right.
It can also be written as:Speed = distance ÷ timeHow could this be rearranged to calculate distance?
A
B
C
D
Experiment to measure the speed of an object
Numeracy in Science – Rearranging
equations and formulaeSlide4
T
he formula for calculating the pressure on a surface is shown on the right.
It can also be written as:pressure = force ÷ areaHow could this be rearranged to calculate force?
A
B
C
D
Numeracy in Science – Rearranging
equations and formulae
Experiment to examine the effect of applying a force over different areasSlide5
T
he formula for calculating density is shown on the right.
It can also be written as:density = mass ÷ volumeHow could this be rearranged to calculate volume?
A
B
C
D
Numeracy in Science – Rearranging
equations and formulae
Experiment to compare the densities of different liquidsSlide6
Numeracy in Science – Rearranging
equations and formulae
Equations and formulae are used in Physics, Chemistry and Biology. Sometimes you will need to rearrange them to work something out.To rearrange them, you need to understand what they mean.The formula for calculating speed is shown on the right. What does it mean?
A
B
C
D
Experiment to measure the speed of an object
ANSWERSlide7
Numeracy in Science – Rearranging
equations and formulae
You rearrange an equation when what you want to work out is not the subject. In the equation below, “power” is the subject. If I wanted to work out “voltage” or “current”, I would need to rearrange it.A
B
C
D
Experiment to measure the current in an electrical circuit and the voltage across resistors
What calculation do you think you would need to do to work out the voltage? (Remember, dividing is the reverse of multiplying).
ANSWERSlide8
T
he formula for calculating speed is shown on the right.
It can also be written as:Speed = distance ÷ timeHow could this be rearranged to calculate distance?
A
B
C
D
Experiment to measure the speed of an object
Numeracy in Science – Rearranging
equations and formulae
ANSWERSlide9
T
he formula for calculating the pressure on a surface is shown on the right.
It can also be written as:pressure = force ÷ areaHow could this be rearranged to calculate force?
A
B
C
D
Numeracy in Science – Rearranging
equations and formulae
Experiment to examine the effect of applying a force over different areas
ANSWERSlide10
T
he formula for calculating density is shown on the right.
It can also be written as:density = mass ÷ volumeHow could this be rearranged to calculate volume?
A
B
C
D
Numeracy in Science – Rearranging
equations and formulae
Experiment to compare the densities of different liquids
ANSWER