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PUSAT TUISYEN ILMU STUDIOBENGKEL PHYSICS Paper 3MERGEFIELD ARAHAN

MERGEFIELD Arahan

1.A student conducts an experiment to investigate the relationship between the mass of a certain liquid that isboiled and the amount of heat used. The student uses a stopwatch to measure the time taken, t. The result ofthe experiment is shown in the graph of m against t shown in Diagram below.

Diagram

(a)

The initial mass, m0of the liquid can be determined from the m-axis. Show on the graph how you woulddetermine m0and state its value.

m0__________________________________

[2 marks/markah]

(b)

State the relationship betweenmandt.

..[1 mark/markah]

(c)

The specific latent heat of vaporisation, L, of the liquid is given by the equation:

where k is the gradient of the graph..(i)

Calculate the gradient of the graph of m against t. Show on the graph how you would determine thegradient.

[3 marks/markah]

(ii)

Calculate the specific latent heat of vaporization, L, of the liquid.

[2 marks/markah]

(d)

Determine the mass, m, of the liquid that is lost if the time taken for heating is 20 minutes. Show on thegraph how you would determine the value of m.

[3 marks/markah]

(e)

Stateoneprecaution that should be taken when the experiment is carried out.

[1 mark/markah]

2.A student carries out an experiment to investigate the relationship between the resistance, R, of a nichrome wire and its length, . The results of the experiment are shown in the graph of R against as in Diagram below.

Diagram /Rajah

(a)

Based on the graph in Diagram above, determine the resistance, R, when the length of nichrome wire is 0.9m. [Show on the graph how you determine the value of ]

[2marks/2markah]

(b)

i.

Based on the graph given, state the relationship between R and .

__________________________________________________________________________________[1mark/1markah]

ii.

Stateoneother factor that can affect the resistance, R, of the nichrome wire.

__________________________________________________________________________________[1mark/markah]

(c)

If m = gradient of the graph, calculate the value of m.[Show on the graph how you determine m]

[3marks/3markah]

(d)

The power produced by a certain nichrome wire, X, is given as, where m = gradient of the graph, and x = length of the wire. Calculate the value of the power, P, for wire X if its length is 0.5 m.

[3marks/3markah]

(e)

Stateoneprecaution that should be taken to improve the results of this experiment.

_____________________________________________________________________________________[1mark/1markah]

3.A student carried out an experiment to investigate the relationship between force, F, and acceleration, a, for a trolley that is pulled downwards on a friction-compensated runway. The student used different numbers ofrubber bands and recorded the acceleration, a, in each case. The student then plotted a graph of a against F as shown in Diagram below.

Diagram /Rajah(a)Based on the graph in Diagram above,

(i)

what will happen when F increases?.[1 mark/markah]

(ii)

determine the acceleration, a, if F = 0.0 N. (Show on the graph how you determine the acceleration)

.

[2 marks/markah]

(iii)

name the condition of the trolley that represents the value in (a)ii.

[1 mark/markah]

(b)Calculate the gradient of the graph.

[3 marks/markah]

(c)By using the gradient obtained in (b) and the formula 1 = km, determine the value of k. The mass,m of aunit trolley is 0.5 kg. gradient

[4 marks/markah]

(d)Stateoneprecaution which must be taken in the experiment.

... [1 mark/markah]

4. A student carried out an experiment to investigate the relationship between the mass of the load, m, and theperiod of oscillation,T, for a spring. The results of the experiment are shown by the graph ofT2againstmin Diagram below.

Diagram /Rajah(a)Calculate the period of oscillation when the mass of the load used is 0.25 kg.Show on the graph how you would determineTand state its value.

_____________________________________________________________________________________

[2 marks/2markah]

(b)State the relationship betweenT2andm.

_____________________________________________________________________________________

[1 mark/1markah]

(c)By using the formulagradient = 42 k(i)

calculate the gradient of the graph ofT2againtsm. Show on the graph how you would determine the gradient.

__________________________________________________________________________________

[3 marks/3markah]

(ii)

from the gradient obtained in (c)(i), calculate the value of the spring constant, k.

__________________________________________________________________________________

[2 marks/2markah]

(d)By using the formula T, determine the period of oscillation,T, if the mass of the load used is 0.8 kg.

_____________________________________________________________________________________

[3 marks/3markah]

(e)Stateoneprecaution that should be taken when carrying out the this experiment.

_____________________________________________________________________________________

[1 mark/1markah]

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