Physics Lab Report Cooling Coffee
Cooling Coffee
Name: Diana Rusina Date:23.11.12
In this practical, you will be assessed on Design, Data Processing & Presentation and Conclusion & Evaluation – Read the checklist of the criteria for guidance.
Introduction:
It is Saturday afternoon. You brew yourself a cup of coffee and are just about to pour cold milk into the coffee. The doorbell rings and you realize immediately that your friend needs your help for a few minutes this afternoon. If you want to have your coffee as warm as possible after you helped your friend, what would be wise to do? Should you pour the milk now, or after you come back? Or does it make no difference?
I would like to add the milk into coffee after I come back. Because the hot coffee without milk will cool longer than the warm coffee with milk.
Aim:
To find out the relationship between the time at which the milk is added, and the final temperature of the coffee/milk mixture. Every minute the coffee was getting cooler (milk was getting warmer until the room temperature), but when we added the milk into coffee it started to cool more faster.
Variables:
Independent:
Dependent: the coffee/ milk temperature dependents of the room temperature.
Controlled: To control variables we can change hot coffee/water and milk every minute, or put hot coffee/ water into thermos and milk into object that has same temperature.
Hypothesis:
My hypothesis is that will be better if we won’t add milk into coffee( because it has a cooling effect), so the coffee will be hoter if we won’t add milk into it.
Apparatus:
1. 250 ml beaker 2. 50 ml beaker 3. 100 ml 4. 50 ml measuring cylinder 5. thermometer 6. kettle 7. water cooler 8. stop watch 9. stirring rod
Thermometer
Diagram:
Thermometer
Hot Coffee (200 ml)
Cold Milk (50 ml)
Method:
1) Take 2 test tubes 2) In the first test tube pour milk 3) In the second one pour hot coffee/hot water.
Name: Diana Rusina Date:23.11.12
In this practical, you will be assessed on Design, Data Processing & Presentation and Conclusion & Evaluation – Read the checklist of the criteria for guidance.
Introduction:
It is Saturday afternoon. You brew yourself a cup of coffee and are just about to pour cold milk into the coffee. The doorbell rings and you realize immediately that your friend needs your help for a few minutes this afternoon. If you want to have your coffee as warm as possible after you helped your friend, what would be wise to do? Should you pour the milk now, or after you come back? Or does it make no difference?
I would like to add the milk into coffee after I come back. Because the hot coffee without milk will cool longer than the warm coffee with milk.
Aim:
To find out the relationship between the time at which the milk is added, and the final temperature of the coffee/milk mixture. Every minute the coffee was getting cooler (milk was getting warmer until the room temperature), but when we added the milk into coffee it started to cool more faster.
Variables:
Independent:
Dependent: the coffee/ milk temperature dependents of the room temperature.
Controlled: To control variables we can change hot coffee/water and milk every minute, or put hot coffee/ water into thermos and milk into object that has same temperature.
Hypothesis:
My hypothesis is that will be better if we won’t add milk into coffee( because it has a cooling effect), so the coffee will be hoter if we won’t add milk into it.
Apparatus:
1. 250 ml beaker 2. 50 ml beaker 3. 100 ml 4. 50 ml measuring cylinder 5. thermometer 6. kettle 7. water cooler 8. stop watch 9. stirring rod
Thermometer
Diagram:
Thermometer
Hot Coffee (200 ml)
Cold Milk (50 ml)
Method:
1) Take 2 test tubes 2) In the first test tube pour milk 3) In the second one pour hot coffee/hot water.