Daily Practice · GCSE Science

Daily Practice - GCSE Science

17th February 1998

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 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 car's velocity increases from 8 m/s to 20 m/s over 4 seconds. Calculate its acceleration.

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