The gradient can be found at different points on a curve. Here it has been multiplied by 60 to convert it from minutes-1 to seconds-1
Lining up a ruler against the curve is essential to drawing a tangent accurately
Be careful that you process the units correctly when finding the gradient. The gradient unit is the y-unit divided by the x-unit, so in the example above the gradient of the curve is measured in cm3 s-1
Sketched graphs show relationships between variables
Which graph shows the correct relationship between the number of moles of a gas, n, and the temperature, T, at constant pressure and volume?
Answer:
The correct option is D
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