Daily Practice

GCSE Science

9th May 1991

5 questions · GCSE · 584 questions in this band

1
Radioactivity, Half-Life and Nuclear Uses
A GM tube detects a count rate of 240 counts per minute from a source. After 15 days the count rate has fallen to 30 counts per minute. Show that this data is consistent with a half-life of 5 days.
2
Forces
State whether friction is a contact force or a non-contact force.
3
Motion: Speed, Velocity and Acceleration
Define the term 'vector quantity' and give one example.
4
Forces, Newton's Laws and Momentum
Calculate the momentum of a 1200 kg car travelling at 18 m/s.
5
Pressure, Moments and Levers
State the equation that links pressure, force and area.

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