1) A beaker can contain 10cm3.
The beaker has 10cm3 of solution.
The beaker has 10 lines.
What is the percentage uncertainty of the beaker?
Show your full working out.
2) A measuring cylinder can contain 10cm3.
The measuring cylinder has 9.5cm3 of solution.
The measuring cylinder has 20 lines.
What is the percentage uncertainty of the measuring cylinder?
Show your full working out.
3) A pipette can contain 10cm3.
The pipette has 10cm3 of solution.
The pipette has 100 lines.
What is the percentage uncertainty of the pipette?
Show your full working out.
Answer:
1) Percentage uncertainty of the beaker = (10 cm3/10 lines) x 100 = 100%
2) Percentage uncertainty of the measuring cylinder = (9.5 cm3/20 lines) x 100 = 47.5%
3) Percentage uncertainty of the pipette = (10 cm3/100 lines) x 100 = 10%