Physics Workshop 2016 CEMPAKA INTENATIONAL...Di suatu carnival belon panas,belon-belon yang naik ke...
7
1 Physics Workshop 2016 CEMPAKA INTENATIONAL Speaker : Thong Kum Soon Success is depend on your mind and your will. You are the one, who decide it. PROVE IT!!
Physics Workshop 2016 CEMPAKA INTENATIONAL...Di suatu carnival belon panas,belon-belon yang naik ke atas di dalam udara akan berhenti pada suatu ketinggian yang tertentu. Terangkan
-short and round = to protect the head if there is any impact and aerofoil shape to increase lifting force when cycling -material interior shell is polystryrene =to prevent head injuries, reduce impulsive force and light in weight -wide strip = hold the helmet and head tightly -air hole present = for air flow and cooling effect on cyclist -the best is N helmet with Polystyrene material interior shell, short and round front end, air hole present and wide strap
4
4.
5.
6.
MOE
Sticky Note
THE LAYER OF AIR NEAR THE GROUND IS HOTTER -the layer of air near the ground is less dense - light ray from sky through layer of air is refracted from normal and totally reflected back into the air -light experience total internal reflection when incident angle is greater than critical angle the cloud on the sky will totally reflected on the road. therefore, mirage is happen. a pool of water is observed on the road
MOE
Sticky Note
states that pressure of moving liquid decreases, as speed liquid increases or vice versa
MOE
Sticky Note
-speed of air on upper roof is higher -pressure of upper roof is lower -differences air pressure between upper part and lower part produces lifting force -F= difference Px A
MOE
Sticky Note
-when cathode ray heated electrons emitted from surface/ thermionic emission -electrons accelerated to anode -electrons travel in straight line -electrons stopped by cross Maltase produce shadow
5
7.
MOE
Sticky Note
-control set of apparatus -determine amount of ice melted due to heat loss from the surrounding
MOE
Sticky Note
-both have same reading
MOE
Sticky Note
-mass of water in D 6.2 is higher
MOE
Sticky Note
-latent heat of fusion
MOE
Sticky Note
-higher latent heat absorbed, higher mass of water collected
MOE
Sticky Note
- mass= (380-180)-(200-180) =180 g
MOE
Sticky Note
Pt= ml 200 (5x 60) =0.18 x l l= 3.33 x 10 5 Jkg-1
6
8.
a) At a hot air balloon carnival, the balloons that are rising up in the air will stop at a certain height. Explain the situation Di suatu carnival belon panas,belon-belon yang naik ke atas di dalam udara akan berhenti pada suatu ketinggian yang tertentu. Terangkan situasi tersebut. [4 marks] b) The best time to launch the hot air balloon is in early morning, why? Masa yang paling baik untuk melancarkan belon udara panas ini adalah pada awal pagi, mengapa? [4 marks]
9.
Diagram 7.1 and Diagram 7.2 show a Bunsen burner and its inner structure. Based on Diagram 7.2 explain how a blue flame can be produced. Rajah 7.1 dan Rajah 7.2 menunjukkan sebuah penunu Bunsen dan struktur dalamannya. Berdasarkan kepada Rajah 7.2, terangkan bagaimana nyalaan biru dapat dihasilkan. [4 marks]
MOE
Sticky Note
- the speed of the jet of gas is high - speed of gas is high and the pressure is low this is due to Bernoulli's principle, the higher the speed, the lower the pressure - atmospheric pressure higher than pressure inside with difference in pressure will draw in the oxygen gas into the jet - more oxygen gas draw in and produce complete combustion.
7
10.
Diagram 54 shows an electric circuit. Voltmeters V1, V2 and V3 have high resistance. Ammeter A1, A2 and A3 and battery have small internal resistance that can be neglected. Bulbs M1, M2 and M3 have same resistance. (a) Based on diagram 9.1, compare the readings of ammeter A1 and ammeter A 3, when the switch S1 is on and switch S2 is off. [1 mark] (b) When switch S1 and switch S2 are on, (i) Compare the brightness of bulb M1 and M2. [1 mark] (ii) Compare the readings of voltmeter V1 and voltmeter V2 [1 mark] (iii) Write down the equation to relate the readings of voltmeter V1 , V2 and V3 . [1 mark] (iv) Write down the equation to relate the readings of ammeter A1, A2 and A3 [1 mark] (c) (i) by referring to (a) state the type of circuit connection for the bulb if only bulbs M1 and M3 light up. [1mark] (ii) Is the circuit connection above suitable to be used in a domestic wiring system? Give a reason for your answer. [2marks]
