Physics 5054 · O Level · Density

Density — practice question

A student is handed a beaker containing some liquid and is asked to work out the liquid’s density. Density is calculated with the equation $\text{density} = \frac{\text{mass}}{\text{volume}}$. He transfers the liquid into a measuring cylinder. Fig. 3.1 shows the measuring cylinder after the liquid has been poured in.
(a(i))[1]

On Fig. 3.1, show where the student’s eye should be when he reads the measuring cylinder.

(a(ii))[1]

Explain why placing the eye here reduces error when the reading is taken.

(a(iii))[1]

State the volume of liquid shown in the measuring cylinder.

(b(i))[1]

State the name of one more item of apparatus the student needs to determine the liquid's density.

(b(ii))[2]

Explain how he makes use of this apparatus in the experiment.

(c)[1]

The student’s eye is in the correct position when he takes the reading. He works out the density from his results. His teacher says that the value he gets is not the same as the actual value. Suggest a reason for this.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: Eye positioned level with the bottom of the meniscus

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