Daily Practice · GCSE Science

Daily Practice - GCSE Science

27th December 1994

5 questions · GCSE · 584 questions in this band

1
Atomic Structure
A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
2
Atomic Structure and the Development of the Model
Why is the atomic model a good example of how scientific models change?
3
Radioactivity, Half-Life and Nuclear Uses
Explain the difference between irradiation and contamination.
4
Forces
A cyclist rides 300 m north then 300 m back south to the start. State the total distance travelled and total displacement.
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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