Physics · May / June 2025 · Paper 61 · Question 1
0625
As printed in the paper
The question as text
A student determines the density of a ball.
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1(a)(i)[1]
two measurements in cm 2.7 and 2.5, both given to nearest mm
1(a)(ii)[1]
correct average: expect 2.6 (cm)
1(a)(iii)[2]
any reasonable advantage for the method in the question given OR it is difficult to measure the diameter directly OR hard to find centre of ball
a ruler for measuring the diameter directly would give rise to parallax errors
1(b)[2]
V = 9.1(4)
unit: cm3
1(c)[2]
correct method for calculation of mB shown
mB = 11.6 (g)
1(d)[3]
on answer line correctly calculated to 2 or more significant figures
unit: g / cm3
answer given to 2 or 3 significant figures
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