Physics 5054/31 — May/June 2010

Cambridge O-Level · Practical Test · worked solutions for every part, with the mark scheme

questions

marks

120

minutes

Topics Observations and Measurements · Experimental Contexts · Analysis, Conclusions and Evaluation · Use of Techniques, Apparatus and Materials · Planning Experiments and Investigations

Q15MObservations and MeasurementsExperimental ContextsUse of Techniques, Apparatus and MaterialsAnalysis, Conclusions and EvaluationFree sample

In this experiment, you will determine the density of the material from which a sphere is made.

You have been provided with 20 glass spheres, two half-metre rules, two set squares and you have access to a top-pan balance.

(a)

Place the two half-metre rules parallel to one another, with a gap between the two, as shown in Fig. 1.1.

Fig. 1.1

Ensure that the spheres are touching each other and are in a line.

Measure the total length $L$ occupied by the 20 spheres.

$L$ = ______

(b)

State, with the aid of a diagram, a technique that you used to ensure that $L$ was determined as accurately as possible.

(c)

(i) Use your value of $L$ to determine the average diameter $d$ of a sphere.

$d$ = ______

(ii) Use the top-pan balance to determine the average mass $m$ of a sphere.

$m$ = ______

(iii) Calculate the density of the material from which the sphere is made, using the relationship

\text{density} = \frac{6m}{\pi d^3}

density = ______

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3 more questions

Q2Observations and Measurements · Experimental Contexts · Use of Techniques, Apparatus and Materials · Analysis, Conclusions and Evaluation5M
Q3Observations and Measurements · Experimental Contexts · Analysis, Conclusions and Evaluation5M
Q4Experimental Contexts · Use of Techniques, Apparatus and Materials · Observations and Measurements · Planning Experiments and Investigations · Analysis, Conclusions and Evaluation15M

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