• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9

What is the best way to keep hot water hot for the longest period of time

Extracts from this document...

Introduction

How can we keep hot water hot?

Introduction

In this practical experiment, I am going to find out what is the best way to keep hot water hot for the longest period of time.  The way that this can be achieved is by preventing, Radiation, Convection and Conduction.

Planning

I am going to apply my background knowledge to the experiment so that it is easier to choose which items I am going to use in the experiment.  Here is my background knowledge.

Background knowledge

I already know that heat can be lost by conduction, convection and radiation.  Therefore it would be in great interest to look into these in depth as then I can see how I can prevent these from occurring.  The first way I am going to cover is conduction

Conduction-

Conduction is what occurs in many solids.  The way it is mainly passed is through the solids’ vibrations.  This is how the solid will look as the vibrations are passed through it.

image00.png

Most non-metals are not good conductors and are good insulators as they do not vibrate as much so therefore the process of conduction is very slow.

Convection-

...read more.

Middle

69

1.30

81

7.00

68

2.00

80

7.30

66

2.30

79

8.00

65

3.00

77

8.30

64

3.30

75

9.00

64

4.00

74

9.30

63

4.30

73

10.00

61

5.00

71

-

-

Here is a line graph with the line of best fit for the above results.

image03.png

After having done the preliminary work I am going to only do each experiment for 5 minutes as by the time it reaches to 5 minutes there is already a basic pattern there.  This change will be the only one for the real experiment.

Plan for real experiments

After having done the preliminary work, I will know write up a plan for the real experiments.

  1. boil kettle
  2. wrap beaker in an item
  3. wait for temperature to reduce to 85˚C
  4. take temp every 30 seconds for 5 minutes
  5. record results
  6. reheat water and repeat steps 1-5 again.

Results

Nothing wrapped around beaker

Time (mins)

Temp (˚C)

0.00

85

0.30

84

1.00

83

1.30

81

2.00

80

2.30

79

3.00

77

3.30

75

4.00

74

4.30

73

5.00

71

Cotton with

...read more.

Conclusion

shiny surface.

My prediction was correct as I wrote that the combination of the three would be very effective as it prevented the loss of heat through conduction, convection and radiation.

Evaluation

I believe that the experiment that I did was a good one as it proved the prediction was right.  The method which I used meant I could get good results, as I improved it after finding any flaws with it after the preliminary work.  The results which were collected were results that I would have expected apart from the cotton with glove as this proved it was quite good at preventing the loss of heat.  I believe that it was very good as it had the glove which prevented convection from occurring.

The method was suitable for the investigation as it was corrected after having done the preliminary method.  If I had more time I would have tested other materials such as wood, cloths and other household materials.

image05.pngimage05.png

By Jasjit Punni

...read more.

This student written piece of work is one of many that can be found in our GCSE Radioactivity 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 star student thought of this essay

4 star(s)

Response to the question

A good experiment. To improve the candidate should indicate flaws and possible improvements in the evaluation of the experiment, or state what they changed after doing the preliminary experiment and why as this shows a deeper understanding of the experiment. ...

Read full review

Response to the question

A good experiment. To improve the candidate should indicate flaws and possible improvements in the evaluation of the experiment, or state what they changed after doing the preliminary experiment and why as this shows a deeper understanding of the experiment. The candidate responds to the question well, setting out a well thought out experiment that worked well.

Level of analysis

The introduction is concise and sets out well what the candidate is trying to achieve. The candidate uses background knowledge to their experiment which is well explained with a definition of each and examples of materials the candidate could use. This is aided well by diagrams. I'm not sure what the radiation diagram is meant to depict. The prediction is outlined and explained well. The candidate uses a preliminary experiment which is good to show as a baseline what will happen without the introduction of materials to prevent the three processes. The candidate assumes 5 minutes is the cut off point for the experiment but this may not be the instance when considering the materials as well. The candidate explains their results well in the evaluation relating what happened to scientific terminology.

Quality of writing

The candidate in the introduction capitalises radiation etc unnecessarily. Minor grammatical errors in places e.g. using then rather than than. The candidate needs capital letters and full stops in their second method. The presentation of the results is good with clear tables and graphs used to predict trends.


Did you find this review helpful? Join our team of reviewers and help other students learn

Reviewed by skatealexia 15/07/2012

Read less
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 Radioactivity essays

  1. Marked by a teacher

    Factors Affecting Heat Loss.

    Them we boiled the water and when it had been boiled we poured 100 cubic centimetres in the measuring cylinder and then poured it into the beaker and put the lid on and inserted the thermometer.

  2. Peer reviewed

    As part of my AS physics coursework I went on a trip to Queen ...

    4 star(s)

    The Biparietal Diameter- is between two sides of the head and is usually measured in 13weeks. From 13 weeks it normally starts at 2.4cm and increases to about 9.5cm The Femur Length- measures the longest bone in the body and this reflects on the longitudinal growth of the fetus.

  1. Peer reviewed

    Ionisation smoke alarms use an ionisation chamber and a source of ionising radiation to ...

    3 star(s)

    Whilst alpha cannot penetrate your skin, people can eat or drink something contaminated with an alpha source.[10] This would leave you with alpha particles in your body, which is very dangerous as they can ionise atoms in your cells. If a cell has been ionised in your body, then the

  2. Investigate how the material of a cup affects the time it takes for the ...

    water hotter for longer I could use this equation: Rate of Heat loss = Q/ t =?AdT/dx We can find ? By rearranging the above ? = Q/dtA *dx/dt Where ? = Thermal conductivity Q = Rate of heat loss dx = distance (thickness of cup)

  1. Half-Life Simulation Practical

    Evaluation: If I were to do this experiment again, I would try to actually do the experiment many times with more dice in the box from the beginning to make my results more precise as I can observe the patterns.

  2. The primary objective of this experiment is to familiarize with the use of an ...

    4.2 Preparation and identification of functional groups of liquid samples 1) A few drops of carbon tetrachloride were dropped between two KBr discs, and air bubbles were avoided to be trapped in the film. 2) The discs were mounted on a sample holder 3)

  1. Radiation: are mobile phones unsafe? Mobiles use electromagnetic radiation in order to send and ...

    People with alzheimer's experience confusion and frequently forget the names of people, places, appointments and recent events. As the disease progresses, people with Alzheimer's need more and more support in order to live their lives. Eventually, they require help with all their daily activities.

  2. Should we use Nuclear power in the UK

    Diagram: How a nuclear power station works Reference: (http://news.bbc.co.uk/1/shared/spl/hi/guides/456900/456932/html/nn2page1.stm) Atoms Nuclear energy is from energy the nucleus (core) of an atom. Atoms are tiny particles that make up every object in the universe. There is enormous energy in the bonds that hold atoms together. Nuclear energy can be used to make electricity. But first the energy must be realeaed.

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