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SET 1 - FORM 4 TOPICS

Section A

[ 28 marks]Answer all question

1. A student carries out an experiment to find the relationship between length, l and

the oscillation period, T, of a simple pendulum. The length of the pendulum used is 10.0cm. The arrangement of the apparatus for the experiment is shown in Diagram 1.1

The pendulum is displaced horizontally to one side and then released so that it oscillates.The time for 10 oscillations, t1, is taken using a stop watch. The pendulum is oscillated

again to obtain the time for 10 oscillations, t2, for the second time. The actual readings of

t1 and t2 are shown in Diagram1.2 .The experiment is repeated by using pendulum with length of 20.0 cm, 30.0 cm,40.0 cm

and 50.0 cm. The readings of the stop watch are shown in Diagram 1.3, 1.4,1.5 and 1.6 .

The period of oscillation, T, of the pendulum is given by the following equation:

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 (a). For the experiment described, identify

(i)  The manipulated variable

[1 mark]

(ii)  The responding variable

[1 mark](iii) A fixed variable

[1 mark](b) Based on Diagram 1.2, 1.3, 1.4, 1.5 and 1.6 , determine t1, t2, tmean, T and T

2 when

l  is equal to 10.0 cm, 20.0 cm, 30.0 cm, 40.0 cm and 50.0 cm.

Tabulate your results for t1, t2, tmean, T and T2 for each value of l  in the space below.

(c) On graph paper, plot a graph of T2 against l.

[5 marks]

(d) Use your graph to state the relationship between T2 and l .

[1 mark]

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2 A student carries out an experiment to investigate the relationship between

 pressure, P and depth, h of a liquid X at sea level. The results of the experiment is as

shown in the graph of P against has in Diagram 2.1.

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The pressureP is determined by using the formula : P = P liquid +Patm where

(a) Based on the graph in Diagram 2.1, determine the atmospheric pressure, Patm 

when h = 0 m.Show on the graph, how you determine the value of the atmospheric pressure.

P atm =

[2 marks](b) The density of the liquid,ρ can be determined from the formula ρ= 0.12 k

where k is the gradient of the graph P against h

(i)  Calculate the gradient, k of the graph of Pagainst h.

Show on the graph how you determine k.K =

[4 marks]

(ii)  Determine the density of liquid, p p =

[1 mark]

(c) Based on the graph on Diagram 2.1, determine the pressure, P exerted on theliquid when the depth of liquid, h = 0.5 m. Show on the graph how you determine P.

P =

[2 marks](d) (i) If the liquid X is replaced with a denser liquid Y, what will happen to the

value of k?

[1 mark]

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(ii) Explain your answer.

[1 mark]

(e) State one precaution that should be taken to improve the results of this

experiment.

[1 mark]Section B

[12 marks]

3. Diagram 3.1 shows a boy pouring boiling water into a cup. The boy’s hand is not

scalded by the water droplets splashing out of the cup.

Diagram 3.2 shows the boy accidently pouring the boiling water directly onto his hand.

His hand is scalded.

Based on the above information and observation, and your knowledge on heat and the

factors affecting heat;(a)  State one suitable inference. [1 mark]

(b)  State one hypothesis. [1 mark]

(c)  With the use of apparatus such as an immersion heater, thermometer, beakers

and other suitable apparatus, design an experiment to test the hypothesis,In your description, state clearly the following:

(i)  The aim of the experiment.

(ii)  The variables in the experiment.

(iii)  The list of apparatus and materials.

(iv) 

The arrangement of the apparatus.(v)  The procedure used in the experiment which should include one

method of controlling the manipulated variable and one method of measuring theresponding variable.

(vi)  The way to tabulate the data.

(vii)  The way to analyse the data.

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 [10 marks]

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4 A student used a slide projector to produce an image on the screen. Diagram 4.1

and Diagram 4.2 show the relative positions of the slide, projector lens and the screen.

It is observed that when the projector lens is moved nearer to the slide as shown inDiagram 4.2, the screen has to be moved further away from the slide to obtain a sharp

image.

Based on the information and observation:(a)  State one suitable inference.

[1 mark](b)  State one hypothesis.

[1 mark]

(c)  With the use of apparatus such as convex lens, filament bulb and other

apparatus describe one experiment to investigate the hypothesis stated in 4(b).

In your description, state clearly the following:(i)  The aim of the experiment.

(ii)  The variables in the experiment.

(iii)  The list of apparatus and materials.

(iv)  The arrangement of the apparatus.(v)

 

The procedure used in the experiment which should include onemethod of controlling the manipulated variable and one method of measuring the

responding variable.

(vi)  The way to tabulate the data.(vii)  The way to analyse the data.

[10 marks]

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