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Edexcel IGCSE Maths 復(fù)習(xí)筆記 4.4.1 Speed, Density & Pressure

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Edexcel IGCSE Maths 復(fù)習(xí)筆記 4.4.1 Speed, Density & Pressure

Speed, density and pressure are all examples of variables which are calculated by dividing one thing by another:Speed = Distance ÷ Time
Density = Mass ÷ VolumePressure = Force ÷ Area
In that respect they can all be treated in the same way

1. Use?UNITS?in Q (or other info) to write down a formula

2. Create BLUE TRIANGLE:e.g. for Speed, Distance and Time

Speed-distance-equation-triangle

3. For each part of the Q write down

what you knowwhat you want to know

4. Use Blue Triangle to?REARRANGE?formula (if necessary)5.?SUBSTITUTE?numbers and SOLVE

6.3.1-Speed-Density-Pressure-WE

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