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papercollection13Activity / Counts per minuteAktiviti / Pembilangan per minit800700600500400300200100XY05 10 15 20 25 30Diagram 6.2 / Rajah 6.2Time / minutesMasa / minit(a) What is the meaning of half life?Apakah maksud separuh hayat?………………………………………………………………………………………[1 mark](b) Based on the decay curves in Diagram 6.2,Berdasarkan lengkungan-lengkungan pereputan dalam Rajah 6.2,(i) State the half life of radioactive substance X and radioactive substance Y.Nyatakan separuh hayat bagi bahan radioaktif X dan bahan radioaktif Y.X : .................................Y : .................................[2 marks](ii) For radioactive substance X and radioactive substance Y, what percentageremains undecayed after 10 minutes?Bagi bahan radioaktif X dan bahan radioaktif Y, berapa peratuskah yangbelum mereput selepas 10 minit?X : .................................Y : .................................[2 marks]
papercollection14(c)Based on the answers to 6(b)(i) and 6(b)(ii), compare the decay rates ofradioactive substance X and radioactive substance Y.Hence state the relationship between decay rate and half life.Berdasarkan jawapan-jawapan kepada 6(b)(i) dan 6(b)(ii), banding kadarpereputan bagi bahan radioaktif X dan bahan radioaktif Y.Seterusnya, nyatakan hubungan antara kadar pereputan dan separuh hayat.………………………………………………………………………………………………………………………………………………………………………………[2 marks](d) Give a reason why the readings of the ratemeters did not drop to zero afterradioactive substance X and radioactive substance Y were removed.Beri satu sebab mengapa bacaan-bacaan meter kadar itu tidak kembali ke sifarselepas bahan radioaktif X dan bahan radioaktif Y dikeluarkan.………………………………………………………………………………………[1 mark]
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Page 35 and 36: papercollection35INFORMATION FOR CA
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Page 39 and 40: papercollection4Section ABahagian A
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Page 55 and 56: papercollection20Menggunakan Rajah
Page 57 and 58: papercollection22(b) Using Diagram
Page 59 and 60: papercollection24Section CBahagian
Page 61 and 62: papercollection12 (a) Diagram 12.1
Page 63 and 64: papercollection28Table 12.2 shows t
Page 65 and 66: papercollection30INFORMATION FOR CA
Page 67 and 68: papercollection2Section ABahagian A
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Page 71 and 72: papercollection6(b)For this part of
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Page 81 and 82: papercollection4531PERSIDANGAN KEBA
Page 83 and 84: papercollection3PHYSICSPaper 2SECTI
Page 85 and 86: papercollection5NO.MARKING CRITERIA
Page 87 and 88: papercollection7SECTION BMARKNOMARK
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