Selangor trial Paper 3 q3 (2011)~~heat

Diagram 3.1 shows a boy accidentally spilt a few drops of hot noodle soup onto his hand and felt slight pain. Later on, he accidentally spilt the whole bowl of hot noodle soup onto himself and felt extreme pain as shown in Diagram 3.2.

Rajah 3.1 menunjukkan mee sup panas terpercik ke atas tangan seorang budak lelaki secara tidak sengaja dan dia merasai sedikit kesakitan. Tidak lama kemudian, sekali lagi secara tidak sengaja dia menumpahkan keseluruhan mee sup yang panas itu ke atas dirinya dan merasai kesakitan yang amat sangat seperti ditunjukkan dalam Rajah 3.2.









Based on the information and observation:
Berdasarkan maklumat dan pemerhatian tersebut:

(a)
State one suitable inference.
Nyatakan satu inferens yang sesuai.

(b)
State one hypothesis that could be investigated.
Nyatakan satu hipotesis yang boleh disiasat.

(c)
With the use of apparatus such as power supply, beaker, immersion heater and other apparatus, describe an experiment to investigate the hypothesis stated in 3(b).
In your description, state clearly the following:

Dengan menggunakan radas seperti bekalan kuasa, bikar, pemanas rendam dan lain-lain
radas, terangkan satu eksperimen untuk menyiasat hipotesis yang dinyatakan di 3(b).
Dalam penerangan anda, jelaskan perkara berikut:

(i)
The aim of the experiment.
Tujuan eksperimen.

(ii)
The variables in the experiment.
Pembolehubah dalameksperimen.

(iii)
list of apparatus and materials.
Senarai radas dan bahan.

(iv)
The arrangement of the apparatus.
Susunan radas.

(v)
The procedure used in the experiment.
Describe how to control the manipulated variable and how to measure the responding variable.
Prosedur yang digunakan dalam eksperimen.
Terangkan bagaimana mengawal pembolehubah dimanipulasikan dan bagaimana mengukur pembolehubah bergerak balas.

(vi)
The way to tabulate the data.
Cara untuk menjadualkan data.

(vii)
The way to analyse the data.
Cara untuk menganalisis data.


Suggested answers:

a. The heat/ time taken of the water depends on its mass/volume
b. The greater the mass/volume, the time taken increase

c .
Aim of the experiment
To investigate the relationship between the time taken and mass/volume


Variables in the experiment
Manipulated variable : mass/volume
Responding variable : Time taken
Constant variable : Initial temperature/specific heat capacity/ changes in temperature


List of apparatus and material
Power supply, thermometer, beaker, immersion heater, stirrer

Arrangement of apparatus


Controlling the manipulated variables
The 20 g of water is filled in the beaker.
The initial temperature, Ө ₀, of water is recorded.
The heater is switched on until the water boiled.

Controlling the responding variables
The time taken for the water is observed and recorded/ The heat is calculated.

Repeat the experiment with four different values of mass.
Repeat with masses of boiling water 40 g, 60 g, 80 g and 100 g.


How you tabulate the data.



How you analyse the data.