PHYSICS - Trial Paper Collection

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papercollection25(b)Table11.1 and Table 11.2 show some characteristics of the coolants and the pipesthat carry the coolant in the refrigerator.Jadual 11.1 dan Jadual 11.2 menunjukkan beberapa ciri bahan penyejuk dansaluran yang membawa bahan penyejuk dalam peti sejuk itu.CoolantBahan penyejukSpecific latent heat of vapourisationHaba pendam tentu pengewapanJ kg -1Boiling pointTakat didiho CP 1.5 × 10 5 35Q 7.6 × 10 5 10R 4.5 × 10 5 -10PipeSaluranTable 11.1 / Jadual 11.1Specific heat capacityMuatan haba tentuJ kg –1 o C –1DiameterDiameterX 220 Big / BesarY 350 Small / KecilZ 180 Big / BesarTable 11.2 / Jadual 11.2(c)Explain the suitability of each characteristic of the coolant and that of the pipe sothat the refrigerator can work efficiently.State which coolant and which pipe should be chosen.Terangkan kesesuaian setiap ciri bahan penyejuk dan saluran supaya peti sejukitu boleh berfungsi dengan cekap.Nyatakan bahan penyejuk dan saluran manakah patut dipilih.[10 marks]500 g of water at 30 o C is placed in the freezer of a refrigerator.500 g air pada 30 o C diletakkan ke dalam peti pembeku sebuah peti sejuk.[Specific latent heat of fusion of ice /Haba pendam tentu perlakuran ais = 3.34 × 10 5 J kg –1 ,Specific heat capacity of water / Muatan haba tentu air = 4 200 J kg –1 o C –1 ](i) Explain the meaning “specific heat capacity of water is 4 200 J kg –1 o C –1”Terangkan maksud “muatan haba tentu air = 4 200 J kg –1 o C –1 ”[1 mark](ii) Calculate the heat removed when the water is cooled to 0 o C.Hitungkan haba yang dikeluarkan apabila air itu disejukkan hingga ke 0 o C.[2 marks](iii) Calculate the heat removed when the water at 0 o C is frozen into ice at 0 o C.Hitungkan haba yang dikeluarkan apabila air pada 0 o C dibekukan menjadiais pada 0 o C.[2 marks]
papercollection12 (a) Diagram 12.1 shows a magnet being used to induce a current in a coil.Rajah 12.1 menunjukkan sebatang magnet digunakan untuk mengaruh arus didalam suatu gegelung.26XNSGMagnet moved towards coilMagnet digerakkan ke arah gegelungDiagram 12.1 / Rajah 12.1(i) State Lenz's law.Nyatakan hukum Lenz.[1 mark](ii) Explain how current is induced in the coil. State the pole at X.Terangkan bagaimana arus diaruh di dalam gegelung itu. Nyatakan kutubdi X.[4 marks]
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