A student used a Geiger-Müller tube and counter to measure the radiation from a sample of a radioactive mineral. The counter recorded 1512 counts in 120 seconds. The background radiation count rate was 0.250.250.25 counts per second.
Calculate the corrected count rate for the mineral sample in counts per second.
16 exam-style questions on AQA GCSE Physics 4.3 Hazards and uses of radioactive emissions and of background radiation, covering 4.3.1 Background radiation, 4.3.2 Different half-lives of radioactive isotopes, and 4.3.3 Uses of nuclear radiation. Each one has a worked solution and a mark scheme showing where the marks go.