5

1. Diagram 1.1 shows a simple mercury barometer placed at the sea level.

Diagram 1.2 shows the height of mercury column when barometer is placed on the top of Mount Kinabalu.

vacuum

vacuum column

mercury column

Placed at the sea levelPlaced on the top of Mount Kinabalu

DIAGRAM1.1

DIAGRAM 1.2

(a)Observe Diagram1.1 and Diagram 1.2

(i)Compare the vertical column of mercury.

[ 1 mark ]

(ii) Based on the answer in 1 (a) (i), relate the altitude with the height of the vertical column of mercury.

[ 1 mark ]

(b)(i)Name the physical quantity which affect the height of the vertical column of mercury.

[ 1 mark ]

(ii)What is the relationship between the physical quantity in 1 b(i) with the height of the vertical column of mercury.

[ 1 mark ]

Filled with gas

Mercury column

Diagram 1.3

(c) If the gas is filled in the vacuum column, what will happen to the height of the vertical column of mercury. Give a reason.

[ 2 marks ]

(d) Suggest one modification that need to be done to the barometer if the mercury is replaced with water. Explain your answer.

[ 2 marks ]

2. Diagram2.1 shows a ripple tank being used to investigate the interference pattern for water waves. The two dippers produce two set of circular waves which are coherent.

DIAGRAM 2.1

Diagram 2.2 shows the interference pattern obtained.

The experiment is then repeated by increasing the frequency of rotation of the motor and interference pattern obtained is shown in Diagram 2.3

DIAGRAM 2.2

DIAGRAM 2.3

(a) What is meant by coherent ?

[ 1 mark ]

(b) Using the interference patterns in Diagram 2.2 and Diagram 2.3, state two observations about the separations between consecutive nodal lines.

[ 2 marks ]

(c)Compare the wavelengths of the water waves in Diagram 2.2 and

Diagram2.3

[ 1 mark ]

(d) Name one constant variable for this experiment ?

[ 1 mark ]

(e) Relate the wavelengths of the water waves with the separations

between consecutive nodal lines.

[ 1 mark ]

(f) If the depth of water in the ripple tank is increased, what happen to the interference pattern produced. Explain your answer.

[ 2 marks ]

3 Figure 3.1 shows a ray of light PQ striking a plane mirror AB.

FIGURE 3.1 (a) (i) Name the light phenomenon involved. -------------------------------------------------------------------------------------

[ 1 mark ] ( ii ) What is the angle of incidence? --------------------------------------------------------------------------------------

[ 1 mark ] ( b ) Figure 3.2 shows the plane mirror replaced by a rectangular glass block KLMN The refractive index of the glass is 1.50.

FIGURE : 3.2 The ray of light PQ is refracted when passing through the rectangular glass block.

(i) Explain why the ray is refracted.

[ 1 mark ](ii) Calculate the angle of refraction, r,of the ray PQ passes through the surface KL.

[ 2 marks]

( c ) The rectangular glass block is displaced slightly to the left, as shown in figure 3.3.

FIGURE : 3.3(i) Complete the diagram in figure 3.3 to show the path of the ray immediately after it strikes the surface LM.

[ 1 mark](ii) Explain your answer in ( c )(i)

[ 2 marks]4 Diagram 4.1 shows an electric circuit. Bulb X, Y and Z have the same resistance of 2 .

Diagram 4.1a. (i) Which of the bulbs X,Y and Z will light up if switches S1 and S2

are closed? ------------------------------------------------------------------- [ 1 mark ] ( ii ) Which of the bulbs X, Y and Z will light up if only switch S1

is closed? --------------------------------------------------------------- [ 1 mark ](iii) Which of the switches S1, S2 or S3 will have no effect on the circuit even if it is removed from the circuit? ----------------------------------------------------------------- [ 1 mark]b. Calculate the effective resistance, R of the circuit.

[ 2 marks ] c. The voltage of the battery is 12 V. If switches S1 and S2

are closed, calculate:

(i) the current in bulb X,

[2 marks] (ii) the current in bulb Y.

[ 1 mark ]5Diagram 5.1 showsa bottle filled with air being held underwatwer. When the hand is released, the bottle emerges to the water surface. The volume of the bottle filled with air is 0.001 m3 and the density of water is 1000 kg m-3. DIAGRAM 5.1c. (i) Name the force, F acting on the bottle.--------------------------------------------------------------------------[ 1 mark ] (ii) Calculate F.

[ 2 marks]d. State the principle involved --------------------------------------------------------------------- [ 1 mark ]e. Diagram 5.2 shows the bottle is filled with sand.

What is the mass needed for the bottle to float as in Diagram 5.1?

DIAGRAM 5.2 [ 2 marks]f. (i) What will happen to the bottle in Diagram 5.2 if the water is

replaced with olive oil of density equal to 800 kg m-3? ---------------------------------------------------------------------[ 1 mark ](iii) Give one reason for your answer in 5(d) (i)

-----------------------------------------------------------------------[ 1 mark]6Diagram 6.1 shows the arrangement of apparatus to study the relationship between pressure and temperature of air at constant volume. The power of immersion heater is 500 W. The results of the experiment are shown intable 6.

Temperature, / CPressure, P / kPa

30100

40103

50107

60110

70113

80117

TABLE 6

(a) Calculate the amount of heat transferred to the water in 1 minute.

[ 2 marks ] (b) On the graph paper below, draw a graph of P against .

[ 2 marks ] (c) The relationship between P and can be written as P = a + b, where a and b are constant.

(i) Using the graph in 6(b), find the values of a and b. [ 3 marks ](ii) What is the pressure of the air when the temperature is 200 C?

[ 1 mark]

7 Table 7 shows the masses of three isotopes of hydrogen. IsotopeMass / a.u.

H1.007825

H2.014102

H3.016049

TABLE 7(a) What is meant by 1 u.a ?

__________________________________________ [ 1 mark ]

(b) One possible nuclear reaction involving two H atoms is as shown in the equation below:

H + H H + H(i) What is the name of this nuclear reaction?

____________________________________________ [ 1 mark ]

(ii) What is the value of x ?

____________________________________________ [ 1 mark ]

(c) The mass of 1 a.u . is 1.6 x 10-27 kg and the speed of light is 3.0 x 108 m s-1. Using the data given in table 7 and the equation in 7(b), calculate

(i) the mass defect, in u, of the reaction, [ 2 marks ]

(ii) the energy released in the reaction. [ 2 marks ]

(d) Why is radioactive material often stored in lead container ?

_____________________________________________ [ 1 mark ]

[Lihat sebelah

Lamp

Ripple tank

Screen

Dipper

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_1248592856.unknown

_1248592999.unknown

_1248593050.unknown

_1248592746.unknown

_1248590563.unknown

_1248590648.unknown

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