Daily Practice

GCSE Science

25th May 1991

5 questions · GCSE · 584 questions in this band

1
Atomic Structure
Define half-life.
2
Atomic Structure and the Development of the Model
What observation showed that the atom is mostly empty space?
3
Radioactivity, Half-Life and Nuclear Uses
Define the term 'half-life' of a radioactive isotope.
4
Forces
A box has a driving force of 250 N forward and friction of 180 N backward. Calculate the resultant force, including its direction.
5
Motion: Speed, Velocity and Acceleration
A ball decelerates uniformly from 18 m/s to 0 m/s over a distance of 2.7 m while being caught. Using (final velocity)^2 = (initial velocity)^2 + 2 x acceleration x distance, calculate its deceleration.

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