• 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

# My aim is to investigate the rate of energy loss in different types of cups by thermal radiation.

Extracts from this document...

Introduction

Planning

Aim:

My aim is to investigate the rate of energy loss in different types of cups by thermal radiation.

Def: Radiation is a process when heat is sent from one place to another, by waves,

without heating the space in between.

Def: Conduction is when energy is passed from one vibrating atom to the next.

Def: Convection is what happens when hot liquids and gases expand and rise while the cool liquid or gas falls (a convection current).

Apparatus list:

• 3polystyrene cups → one painted black (matt)

→ one plain white (matt)

→ one covered with aluminium foil (shiny)

• hot water – caution! (3x  70ml)
• cold water (3x  70ml)
• a thermometer
• a pen
• a heatproof mat (for safety: HOT WATER!)
• polystyrene lids - with holes in middle to insert thermometer (x3)
• a stop-clock/watch

Prediction:

Dull, dark surfaces are good radiators (i.e. lose heat/energy more easily), but bright, shiny surfaces are poor radiators (i.e. store heat/energy more easily).

Therefore, part of my prediction is that the painted black matt polystyrene cup will lose the most heat or energy, as it is matt (dull) and black (dark); the polystyrene cup covered in aluminium foil will keep the most heat because it is silver (bright) and made of foil (shiny); whilst the plain white polystyrene cup will lose some heat, as it is matt (dull) but at the same time, it will be able to store some heat as well as it is white (bright). Metals are good conductors so the aluminium foil will help conduct heat, however, liquids are poor conductors (i.e.

Middle

6

7

8

9

10

Painted black cup

87

94

84

90

82

88.5

80

87

79.5

85

77

84

76

82.5

75

81

74

81

73

78.5

72

77.5

Average

90.5

87

85.25

83.5

82.75

80.5

79.25

78

77

75.75

74.75

Cup with tin foil

87

94

85

93

83.5

90

82.5

88

81

86.5

79.5

85

78.5

85

77.5

83

76.5

81.5

75.5

80

74

79.5

Average

90.5

88.5

86.75

85.25

83.25

82.25

81.25

80.25

79

77.75

76.75

Dull white cup

87

94

85

92

84

89

83

87

81

85

80

84

79

83.5

77

83

76

82

75

81

73.5

80

Average

90.5

88.5

86.5

85

83

82

81.5

80

79

78

76.75

(All of the above results are in degrees Celsius.)

Average of range: 90.5 C

Range of starting temperature for 1st and 2nd readings: 7 C

Graph(s):

See graph paper.

Observing:

I have noticed, from the graphs (see graph paper)

Conclusion

is alteredby properties of the different surfaces onvarious containers. My results do have a poor range (7 C) but I think that effectively this only affects the visibility of change on the graph, not the reliability of my results, as I have not found any problems analysing them.

I cannot see points, which are way away from the line of best fit. Obviously there are some, which are slightly off the line, but none are of a noticeable distance away. This leads me to believe that my results do have a good level of reliability.

As I explained in my conclusion my results and experiment sums up an excellent outcome from the aim (‘to investigate the rate of energy loss in different types of cups by thermal radiation’) which is basically that good radiators have properties like dull/matt, dark and so on and poor radiators have properties such as shiny, bright, for example. My results were good enough for me to be able to plot them on the graph, though. I believe my results have been good enough for me to draw a strong conclusion, as I have been able to justify and back up my conclusion with evidence, scientific facts and results.

I think improvements such as better room conditions and a better range in my results would be good for other such experiments and repeats. Also, repeats could help me draw a better conclusion and a graph, which has a better quality of readability, and could also help me average my results.

The evidence, although at points hard to read (on the graph) showed a pattern, which makes me confident the experiment, was a success: the better radiator, the quicker the liquid (water) cools down.

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

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

# Related GCSE Electricity and Magnetism essays

1. ## Investigating the Heat Loss of Water From a Beaker

In metals conduction is particularly effective. This is due to the large amount of 'free electrons' in all metals that are able to pass on the energy and vibration quickly because there are to many of them so close together. Insulators, like foam, do not conduct well because they do not have many free electrons to

2. ## &amp;quot;My aim is to find out how much energy is released when burning different ...

When you read the nutritional information on the foods packets you buy, the amount of calories in the food are stated.

1. ## Heat loss

Stop watch To time the experiment Prediction I predict that having a lid/ covering the top of the beaker prevents/reduces heat transfer. This is because; convection is a heat transfer in which currents flow from a warm surface to a colder one.

2. ## An analysis of the properties of aluminium

the energy required to produce the primary metal initially is needed in the recycling process. 1. Lightweight The specific gravity of Aluminium is 2.7, about one-third that of iron (7.9) and copper (8.9). This feature is particularly important in transportation industries: for example, aircraft, automobiles; trains and ships.

1. ## Experiment to investigate the energy given of in food stuffs.

* We moved the Bunsen burner right out the way so the water in the test tube only gets heat from the burning peanut, not the Bunsen burner. * We only lit each peanut until there was a visible flame coming from the peanut.

2. ## Investigating The Heat Of Combustion Of Alcohols.

This will reduce the accuracy of our experiment. The copper calorimeter absorbs very little heat since it is a good conductor of heat. The soot was cleaned of after every test to ensure that heat was not absorbed by the soot thus making the experiment an unfair one.

1. ## Molecular stability (rheology) of a plastic carrier bag through stress - strain tests.

Plastics do not need a great deal of heat to be moulded into shapes but metals tend to have a high melting point, this is cheaper for industries because less energy is used to make their products. The strengths of plastics are shown in industry through fire resistant material, bulletproof vests and puncture resistant tyres, buildings etc.

2. ## In my investigation I will measure the heat given out by different types of ...

are influenced by both nuclei and therefore forms the molecular orbital (M.O.), and the electrons occupies the orbital whose energy is the lowest available to it. The filling of electrons to the M.O. i.e. the orbital in the sub-shells of the shells are filled up with electrons leads to the

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