# Physics Lab

Topics: Temperature, Thermometer, Thermodynamics Pages: 5 (848 words) Published: April 26, 2013
Internal Assessment Cover Sheet
Group 4 (Experimental Sciences)
SUBJECT-PHYSICS
Ms. Maitreyee Banerjee
Ms. Maitreyee Banerjee
Aryaman Ghulati

Aryaman Ghulati

Student Name and signatureTeacher Name

Investigation of any one factor that affects the rate of cooling of a cup of coffee. Investigation of any one factor that affects the rate of cooling of a cup of coffee. Title of Investigation

Depending on the surrounding temperature of the cup of coffee the rate of cooling will differ. Depending on the surrounding temperature of the cup of coffee the rate of cooling will differ. Short Description of Investigation

Level: Higher Level Standard Level
1 hour
1 hour
TopicTime Spent (in hours):
Thermal properties

Thermal properties

Use of ICT (if applicable)
Data Logging Graph Plotting Software
Spreadsheet Database Computer Model or Simulation
Criteria Assessed
Design
Data collection and Processing
Conclusion and Evaluation

CRITERIA ASSESSED
In this practical you will be asked to write a partial/full lab report. This written report will be assessed against:

Design Data Collection & Processing Conclusion and Evaluation

Criteria| Aspects*| C| P| N|
Design| Defining problem and selecting variables| | | | | Controlling variables| | | |
| Developing a method for the collection of data| | | |

Criteria| Aspects*| C| P| N|
Data collection and processing| Recording raw data| | | | | Processing raw data| | | |
| Presented processed data| | | |

Criteria| Aspects*| C| P| N|
Conclusion and Evaluation| Conclusion| | | |
| Evaluation| | | |
| Improving the investigation| | | |

* C stands for Completely (2 marks), P stands for Partly (1 mark) and N stands for Not at all (0 marks)

RESEARCH QUESTION / AIM
How does the surrounding temperature affect the rate of cooling of a cup of coffee.

HYPOTHESIS
As the surrounding temperature increases the rate of cooling will decrease and as the surrounding temperature decreases the rate of cooling increase. Thus we see that the rate of cooling of the cup of coffee is inversely proportionate to the surrounding temperature. c∝1t where c-rate of cooling and t-sorrounding temperature.

APPARATUS
Cup of coffee; 2x thermometer; Stopwatch(digital);

VARIABLES
Dependent Variable: Rate of cooling
Independent Variable: The surrounding temperature
Controlled Variables:
1. Initial temperature of the cup of coffee (50°C)
2. Surface area of the coffee (normal coffee mug).
Controlling the Variables:

Independent Variable
As the surrounding temperature differs, so will the rate of cooling of the coffee. Hence the rate of cooling is dependent on the surrounding temperature. Dependent Variable
As the surrounding temperature increase the rate of cooling for the cup of coffee will decrease and as the surrounding temperature decrease the rate of cooling will increase. Hence the rate of cooling is dependent on the surrounding temperature.

Controlled Variables:

1. The main controlled variable would be the initial temperature of the coffee. This variable is important as according to the initial temperature we know that the time taken for the cup of coffee to cool would depend on the increase or decrease of the initial temperature. 2. The surface area of the coffee is also a very important controlled variable, because as the surface area increases the rate of cooling also increases. Thus will affect the time taken for the cup of coffee to cool.

PROCEDURE
1) Check the surrounding temperature, check the initial temperature of the coffee(50°C) 2) Keep the coffee on the table where the surrounding temperature was checked 3) Keep checking the temperature of the coffee at intervals of 5 minutes. 4) Record the temperature at the end of each 5 minutes

5) To prove the hypothesis we can carry out this experiment...

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