Expand Or Contract?

16 08 2012

EFFECTS OF HEAT ON MATTER
KESAN HABA KE ATAS BAHAN

(1) Matter expands when heated.
     Bahan mengembang apabila dipanaskan.

     (a) Volumes increase
          Isipadu bertambah

     (b) Becomes bigger
          Menjadi besar

(2) Matter contracts when cooled.
     Bahan mengecut apabila disejukkan.

     (a) Volumes decrease
          Isipadu berkurang

     (b) Becomes smaller
          Menjadi kecil

APPLICATIONS OF EXPANSION AND CONTRACTION
APLIKASI PENGEMBANGAN DAN PENGECUTAN BAHAN

(1) The principle of expansion and contraction is applied in everyday life.
     Prinsip pengembangan dan pengecutan diaplikasikan dalam kehidupan harian.


Railway tracks are laid with gaps between them to allow for expansion during hot weather.
Landasan kereta api dibina dengan ruang-ruang di antaranya untuk membolehkan pengembangan semasa cuaca panas.
 
Gaps are left between concrete slabs on pavements to allow for expansion on hot days.
Ruang-ruang dibuat di antara kepingan konkrit pada laluan pejalan kaki untuk membolehkan pengembangan pada hari panas.
Electric cables are installed so that they sag to prevent them from snapping when they contract during cold weather.
Kabel elektrik dipasang secara melendut untuk mengelakkan kabel daripada putus apabila mengecut semasa cuaca sejuk.
One end of a steel bridge is mounted on rollers to allow for expansion in hot weather.
Salah satu hujung jambatan keluli diletakkan di atas penggolek untuk membolehkan pengambangan semasa cuaca panas.

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