Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
19th December 2007
- 1Radioactivity, Half-Life and Nuclear Uses
Radium-226 (atomic number 88) decays by alpha emission. State the atomic number of the nucleus formed.
- 2Forces
A resultant force of 45 N acts on an object of mass 9.0 kg. Calculate its acceleration. Use F = m x a.
- 3Motion: Speed, Velocity and Acceleration
State what the gradient of a distance-time graph represents.
- 4Forces, Newton's Laws and Momentum
Explain why a larger vehicle mass increases braking distance.
- 5Pressure, Moments and Levers
Explain why a rucksack with wide, padded straps is more comfortable to carry than one with thin straps, for the same load.
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