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

I am going to perform an experiment which will aid Virgin Trains in looking for the supreme hot drinks cup to be used in their buffet bars. The design must keep the drink as hot as possible for as long as possible.

Extracts from this document...

Introduction

Craig Reynolds

Science Coursework

I am going to perform an experiment which will aid Virgin Trains in looking for the supreme hot drinks cup to be used in their buffet bars. The design must keep the drink as hot as possible for as long as possible. I will be investigating what affects the rate of which liquids in cups cool down. Factors to be taken into account are;

Convection.

Convection is a mode of heat transfer through gases and in this case, liquids. Convection depends on the fact that fluids expand when heated and undertake a decrease in density. As a result, the warmer, less dense portion of the fluid will rise through the surrounding cooler fluid in accordance to Archimedes Principle. If heat continues to be supplied, the cooler fluid that flows in to replace the rising warmer fluid will become heated and also rise. This causes

...read more.

Middle

68.2

63.4

60.3

60.1

64.8

67.5

8

66.6

61.3

58.3

57.8

62.8

65.7

9

64.6

59.4

56.6

55.6

61

63.8

10

62.1

57.7

55.9

53.4

58.9

61.9

11

61.2

56.5

54.2

52.8

57.6

60.3

12

59.6

54.9

52.7

51.5

56

58.9

13

58.8

54

51.5

50.4

54.7

57.7

14

57.5

52.4

48.9

47.6

53.5

56.5

15

56.4

51.1

45.9

46.7

52.3

55.3

These results are inaccurate as the starting temperatures are dissimilar. Because of this I produced a different table with all results being added-to so that the starting temperature is 90  for

...read more.

Conclusion

"c4">80.3

4

75.2

70.4

77.3

73.3

75.4

77.7

5

72.5

68.1

75.4

71.8

72.4

74.9

6

69.7

65.6

73.2

70.4

70.1

72.3

7

68.2

63.4

70.3

70.1

67.8

70.5

8

66.6

61.3

68.3

67.8

65.8

68.7

9

64.6

59.4

66.6

65.6

64

66.8

10

62.1

57.7

65.9

63.4

61.9

64.9

11

61.2

56.5

64.2

62.8

60.6

63.3

12

59.6

54.9

62.7

61.5

59

61.9

13

58.8

54

61.5

60.4

57.7

60.7

14

57.5

52.4

58.9

57.6

56.5

59.5

15

56.4

51.1

55.9

56.7

55.3

58.3

As these results show, the polythene cup covered in silver foil managed to keep the liquid hottest for the longest time. This proves my prediction. The white plastic cup came second in terms of keeping the liquid hottest.

A scatter diagram of the white plastic cup.

image00.png

A scatter diagram of the polythene cup with silver foil

image01.png

The circled points of the above graphs are anomalous results, these results do not fit in with the trend of results. This could be due to a misread temperature or perhaps the temperature was recorded not exactly on the minute.

The observations I have made are not as accurate as they could be. I could have made it a fairer test by rechecking that all results were recorded exactly on the minute. Also I could have used the digital data collectors instead of an ordinary thermometer. As further work I would like to try the polythene cup with silver foil and a lid. I feel this would vastly decrease heat loss.

Science Coursework.doc

...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

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. Peer reviewed

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

    4 star(s)

    All this can be assessed and measurements are made accurately on the images displaced on the screen. Such as measurements of size and growth in the foetus. Why and when is ultra sound used in pregnancy. Ultra sound scan is currently considered to be safe it is accurate and very cost effective investigation of the foetus.

  2. Peer reviewed

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

    4 star(s)

    It can travel through a vacuum, we know this as if this was incorrect we could not absorb heat from the sun. 2. It can be reflected away by a silver surface * 3. There are no particles involved as it travels by just waves.

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

    Materials which trap air, e.g. wool, felt, fur, feathers, polystyrene, fibreglass, are also very bad conductors. Some of these materials are used as 'lagging' to insulate water pipes, hot water cylinders, ovens, refrigerators and the walls and roofs of houses.

  2. Thermal Insulation

    The clothing slows down that heat loss. Also, the clothing prevents body heat from leaving and being lost to the cold air. Liquid to solid Likewise, when you swim in water, cold water can lower your body temperature through conduction. That is why some swimmers wear rubber wet suits to insulate them from the cold water.

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

    in their brains as they aged. The rest of the mice were non-demented. The mice spent two one-hour periods each day for 7-9 months exposed to the electro-magnetic field generated by a standard phone. Their cages were placed within the same distance from a centrally located antenna generating the phone signal.

  2. The advantages and disadvantages of nuclear power and fossil fuels and which is the ...

    It is sealed in special concrete reinforced containers. The United States Department of Energy's long-range plan is for this spent fuel to be stored deep in the earth in a geologic repository. The proposed site is Yucca Mountain, Nevada. Currently, all spent (used) fuel is stored at the power plant at which it was used.

  1. Factors affectin cooling rate

    Repeat experiment for all other sized beakers. 16) Using these results, draw a graph with the temperature along the y-axis and along the x-axis. 17) Evaluate your results justifying your prediction. 18) Write an analysis based on your findings.

  2. Conduct an experiment involving the three mechanisms of heat loss - conduction, convection and ...

    I can not predict whether Cup 3 will cool faster than 4, because I am unsure which mechanism of heat loss, conduction or radiation, discards the most heat. It will be interesting to find out. Results: Fig. 2 Time (mins)

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