SELAMAT DATANG TEKNIK MENJAWAB FIZIK KERTAS 2 PHYSICS

SELAMAT DATANG TEKNIK MENJAWAB FIZIK KERTAS 2 PHYSICS IS FANTASTIC

Paper 2 ( 100 ) Part A ( Structures ) => 60 Part B ( Observing ) => 20 Part C ( Choosing) => 20 ANALYSIS- PASS YEARS ESSAY QUESTIONS

Tahun Q 9 2004 Analisis spm Q 10 Q 11 Q 12 Light /mirror pericope. . Radioactive Use of radioactive – factory Heat ( food container) Electromagnet/ Electronic Transformer / diod 2005 Pressure Archimedes ( hydrometer) Waves (Location for jetty / retaining wall) Light Lens. (presbyopia) Electomagnet (transformertransmission electricity) 2006 Light / Lens(astronomic telescope ) Electromagnet (motor a. c—d. c) Heat ( car Radiator) Radioactive (sterilization of med. equipments) 2007 Pressure Bernoulli ( Sailboat) Electronic Transistor (On when dark–On when hot) Force and motion (Safety feature for lorry) Waves (spec. for radar systems ) Force and motion (elasticity/safety in sport) Radioactive (safety in handling radioactive source) Light Total internal reflection ( fibre optic) Waves Retaining wall Pressure (Vacuum cleaner) Radioactive (halt life/ treatment cancer) Heat ( Water flask ) Electricity ( non-ohmic / lampfilament ) 2008 2009

Analisis mengikut tajuk Tahun 2 3 2004 2005 5 I I I 2006 I I 2007 I 2008 I 2009 4 7 I I I --- Part B 9 10 I I I 8 I I 6 I I I I ---- Part C

Q. 12 -2008 • A new harbour is to be built at a new location. The suggested new location is either at a bay or a cape. Four models for the structure of the retaining wall are given. Table 12 below shows the location and the characteristics of the four retaining walls.

Worksheet

• Explain the best location and the suitability of each characterictics in Table 12. • Determine the most suitable retaining wall to be used. • Give the reason for your choice.

Answer Characteristic BAY The ______ SLOPING ______retaining wall. UNEVEN ______ surface HIGH ______ retaining wall Explaination / reason Water is calmer Decrease the wavelength / higher water pressure at higher depth. Reduce energy, wave is reflected at different direction. Protect form high wave / overflow of water. 8 marks

W RETAINING WALL The most suitable _________ is _____ LOCATED AT BAY, SLOPING RETAING WALL, Because _________________ UNEVEN SURFACE AND HIGH RETAINING WALL ____________________ 2 marks TOTAL : 10 marks

Pemarkahan -- kes 1 1. Maximum ONLY 4 marks EXPLAINING ALL THE TYPE OF RETAINING WALL. BUTTTT…… NOT CHOOSE ANYTHING OR CHOOSE MORE THAN ONE RETAINING WALL. MARKS given only for the CORRECT REASONs

Pemarkahan -- kes 2 • EXPLAINING ALL THE CHARACTERISTICS OF given RETAINING WALL • BUTTTT……CHOOSE wrongly MARKS only will be given AT WHAT YOU CHOOSE MAX--- 8 MARKS

Characteristic HIGH ____melting point low ______resista nce Explaination / reason Can withstand high temperature More power produce low ______ ability to break at high temperature Long lasting / Can withstand high temp / LOW ______ oxidation level Prevent rusting / Less corrosive

P The most suitable _heating element____ is _____ high melting, point, low resistance, Because _________________ low ability to break at high temperature, and ____________________ low oxidation level.

NO. 3 Characteristic Explaination / reason LOW ____specific Easy get cold / becomes cool heat capacity. quickly smaller ______size of Easier to carry ice cream box Material for Poor conductor of heat outer box: Plastic PVC ______ Bright ______ colour Does not absorb heat from of outer box surrounding quickly

R The most suitable _ice cream container_ is _____ Low specific heat capacity, small size of ice Because _________________ cream box, material for outer box is plastic pvc ____________________ and bright colour of outer box

No. 4 Characteristic Large ____ diameter LOW _____density LOW ______ rate of expansion HIGH ______ melting point Explaination / reason Reduce the resistance of the cables The cables will be lighter Less expansion and sagging in the cable during hot day Can withstand high temperature / does not melting easily

The most suitable ______cable_______ Q is _____ Large diameter, low density, Because _________________ Low rate of expansion and high melting point. ____________________

Physics is Fantastic Good Luck & Thank You Pn. Aswati Ishak