Chapter 5: Rates and Ratios Notes

Sections

1. 5A Rates and concentration Mastered

   Rates with two different units, concentration as a rate (g/L, mg/mL, % w/v and % v/v), diluting a solution, and drip rates for intravenous fluids.

   Open notes
2. 5B Heart rate Mastered

   Heart rate in beats per minute from a count over a shorter time, estimated maximum heart rate, target training zones, recovery rate, and how much blood the heart pumps.

   Open notes
3. 5C Energy and fuel consumption rates Mastered

   Converting between L/100 km and km/L, comparing petrol, hybrid and electric cars by cost per kilometre and per year, payback time for a more efficient car, gas use in MJ, and solar power savings.

   Open notes
4. 5D Ratios and dividing in a ratio Mastered

   Simplifying ratios with mixed units, two- and three-part ratios, dividing a quantity in a given ratio, and the unitary method when one share or a difference is known.

   Open notes
5. 5E Scale drawings, plans and elevations Mastered

   Using a scale such as 1:100 to move between plan and real measurements, finding a scale, reading floor plans, site plans and elevations, and using them to find areas, volumes and costs.

   Open notes
6. 5F Land measurement from plans Mastered

   Offset (traverse) surveys and field books, splitting a block into triangles and trapezia to find its area, converting to hectares, and using the trapezoidal rule with measurements taken from a scaled plan.

   Open notes