• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Thermal insulators.

Extracts from this document...

Introduction

Zeadon Jamil

Thermal insulators

Aim

To investigate different materials for the most effective thermal insulator for a house.

Introduction

Heat transfer is the gain and loss of energy.

There are three ways in which thermal energy can be transferred:

  • Conduction
  • Convection
  • Radiation

Conduction – this is when energy travels from molecule to another.  When one molecule receives energy it begins to vibrate and hits other molecules and makes them vibrate. And will spread throughout the object.

Convection – this will only occur in gases and liquids.  When heat is applied to the bottom of the substance, it will heat it up.  When it heats up, it will rise to the top, forcing colder areas towards the heat source and then they will receive energy and rise to the top, etc.

Radiation – it travels in waves.  When it hits a molecule it makes it vibrate.

I will be concentrating on conduction, as this is the main way in which thermal energy is transferred lost from housing.  Which means that I need something that is a bad thermal conductor (good thermal insulator)

...read more.

Middle

I think that the best thermal insulator will be the bubble wrap due to the fact that it contains trapped air.  Trapped air is a good insulator therefore it takes longer for energy to transfer through gasses because the molecules are further part, a vibrating molecule takes longer to hit into another molecule and make it vibrate.  The worst thermal insulator will be something that has compact molecules as it is easy for the vibrations to spread throughout.

...read more.

Conclusion

Evaluation

Although this experiment went well I felt that it could have been improved, for example. Having the same length and width of each material would have the experiment much better in fairness.  Also I was not able to repeat the experiment twice more due to lack of time which severely affected the accuracy of the results and investigation.  Finally having a thermometer for making sure the room temp stays the same

I think that the method was fine and has no problems of any sort except one:  testing the room temp and making sure it stays the same.

Conclusion

To conclude, this experiment was seemingly fair, however there is a margin for improvement.

The paper was the best insulator however I think this was an accident due to the trapped air.

I now know that the closer the molecules in an object the better the object is at conducting energy. Which means any thing with trapped air would be a sufficient insulator.  This is why they use double glazed windows as an insulator.

...read more.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Here's what a teacher thought of this essay

4 star(s)

This is a well written and structured report.
1. The sources of information need to be referenced.
2. There are several pieces of information in the wrong section.
3. The evaluation should suggest further research opportunities.
****

Marked by teacher Luke Smithen 05/09/2013

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Electricity and Magnetism essays

  1. To investigate which fuel gives out the most energy when burnt. We are burning ...

    The average of these results and my final result is: 137.6KJ/MOL * Ethanol This alcohol released 287.13KJ/MOL in the first experiment, and 276.65KJ/MOL in the second experiment. The average of these results and my final result is: 281.81KJ/MOL * Propanol This alcohol released 497.24KJ/MOL in the first experiment, and 360.09KJ/MOL in the second experiment.

  2. A Resistance Investigation - Independent Variables

    increased as temperature increases Objectives From the preliminary trials we are trying to determine the final circuit diagram, to do this we are tying to decide on the best and most suitable equipment for the investigation for example we are trying to find out which is the best power source to use out of a cell and a battery.

  1. The Bouncing Ball Experiment

    I would say that my results are probably quite reliable because we made every effort to make the trial experiment fair, and my results turned out to be as I expected. The purpose of the preliminary experiment was to give me an idea of how my real thing would go so I would be prepared.

  2. To find out what happens to the efficiency of a motor as I change ...

    * An increase in the current drawn by the motor. This causes an increase in the resistance of the wires connecting the motor to the power supply, which in turn causes electrical energy to be wasted in the form of heat, lowering the amount of useful energy output, and therefore lowering the motor's efficiency.

  1. An investigation of the factors affecting the output of a transformer.

    (see graph below) This is called a step up transformer because the voltage increases despite the fact that the current decreases. voltage (v) Current (a) A graph to show the relationship between voltage and current. The distance between the coils. The further magnetic fields are from their source the weaker they are.

  2. Nichrome Wire Experiment

    The long wire is just like two short wires put together. Electrons give energy to atoms in a conductor (in our case the Nichrome wire,) by colliding with them. This is shown below in a diagram. Resistance of the wire will increase as the length of the wire increases because

  1. Design an experiment to predict and test the output from a simple AC generator.

    and Force (F) can be found. In a conducting wire such as the wire above the particles that are free to move are the electrons. Metallic bonding is described as positively charged ions suspended in a sea of delocalised electrons The positive ions are fixed in place and the electrons are delocalised.

  2. To investigate how a height of a ramp affects the speed of a trolley ...

    you can see that the height is proportional to the speed, as the height increases the speed also increases; Therefore height speed My results table show; When I have a ramp height of 7cm the speed of the car is 0.23 m/s.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work