Exam-style questions in the shape of Paper 1 and Paper 2, with full markschemes. Read the markscheme, or type, photograph or draw your answer and get it marked.
A circular inspection window has a radius recorded as correct to the nearest
For this question, percentage error is
Write down the lower and upper bounds for the radius.
Calculate the estimated area of the window, giving your answer to three significant figures.
Determine the greatest possible percentage error in this estimated area. Use unrounded values in your calculations and give your answer to three significant figures.
A laboratory receives microscopic particles in sealed deliveries. Figure 1 shows the mass of one particle and the numbers of particles and cartridges in a cartridge and a delivery, respectively. The diagram is not to scale.
(a) Calculate the mass of particles in one cartridge. Give your answer in standard form, correct to 2 significant figures. [2]
(b) Calculate the total mass of particles in one delivery. Give your answer in standard form, correct to 2 significant figures. [2]
(c) A laboratory requires at least of particles. Find the minimum whole number of deliveries required. [2]
Calculate the mass of particles in one cartridge. Give your answer in standard form, correct to 2 significant figures.
Calculate the total mass of particles in one delivery. Give your answer in standard form, correct to 2 significant figures.
A laboratory requires at least of particles. Find the minimum whole number of deliveries required.
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