![]() ![]() (c) 1st : show on the graph2nd : half life = 4 hours ![]() (b) Background readings // natural radioactivity in the ground, bricks or buildings and 1 Respectively thus produces a pulse of current.Any two marks (c) 1st: The atmospheric pressure which is higher pushes the liquid up through thenarrow tube.Ģnd : The jet air will force the liquid to be sprayed as fine spray liquidĤ(a)(i) / / 1(a)(ii) 1st: The radioactive emission enters the tube through the mica windowĢnd :ionizes the neon gas.3rd : The electron and positive ion are attracted towards the anode and cathode (b) The ratchet knob prevents over tightening // avoid extra pressure 1 PEPERIKSAAN PERCUBAAN MELAKA 2008MARKING SCHEME : PAPER 2
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