hello. i will be appearing for my a levs in a couple of months and this is a 'design experiment' question i need help with. i haven't ever designed an experiment and help will be appreciated. Question: 'Alpha particles from a particular radioactive source have a range of about 6 or 7 cm. This is because the kinetic energy of the alpha particles is continually being transferred to air molecules due to collisions between the alpha particles and air molecules. Design a laboratory experiment to investigate how the range of alpha particles in air is affected by the air pressure. In your account it is expected that you will: a) Draw a diagram showing how the aparatus would be used in your investigation (.. i suppose this won't be possible here...) b) Explain clearly the procedure to be followed c) name the alpha particle detector which you would use. d) state any safety precautions which may need to be taken when performing this experiment.