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

To investigate the rate of cooling in three different types of cups

Extracts from this document...

Introduction

Problem

The problem for this experiment is to investigate the rate of cooling in three different types of cups. They will be used as typical coffee cups for commercial purposes. The cups a polystyrene cup, a paper cup and a plastic cup.

Water has a high specific heat capacity. This makes it a very useful material for storing and carrying heat energy. Its heat capacity is 4200 joules per kilogram per  °C (4200J/kg °C).

This is how water compares with other material:

image00.png

Calculating heat energy:

For water:

                4200 J heats 1 kg through 1 °C

               8400 J heats 2 kg through 1 °C

           84 000 J heats 2 kg through 10 °C

You could also calculate the result using an equation

heat energy = mass * specific heat * temperature

  gained                         capacity              rise

   (J)                (kg)         (J/kg °C)              (°C)                         

Heat tends to flow away from a hotter object to a cooler surroundings. Heat is mainly lost I conduction, convection, radiation and evaporation. For this experiment I will be only using convection, radiation, evaporation because conduction is mainly in solids.

Convection

...read more.

Middle

°C I poured 100ml of water from the beaker to the measuring cylinder.
  • Then I poured the water from the measuring cylinder into the polystyrene cup with a covered cork lid and a thermometer.
  • I took the readings of the temperature every 30 seconds for six minutes.
  • I repeated the same procedure for the paper and plastic cup.

Diagram

Results

Plastic

Time (mins&secs)

Temp (°C)

0

75 °C

30secs

60 °C

1min

59 °C

1min 30secs

58.5 °C

2mins

58 °C

2mins 30secs

58 °C

3mins

57.5 °C

3mins 30secs

57 °C

4mins

56.5 °C

4mins 30secs

56 °C

5mins

56 °C

5mins 30secs

55.5 °C

6mins

55 °C

...read more.

Conclusion

Polystyrene is the best insulator because it has topped pockets of air in it and this reduces convection because air can’t move and heat has to be lost by conduction, which is very slow in air.

I was wrong by saying that paper will be the quickest to cool down, plastic was.

Evaluation

If I had more time I would have repeated the experiment three to five times. My conclusion is only based on one set results so it might not be right because theoretically paper should lose heat faster than plastic.

So if I repeat the experiment I will have fewer errors and more accuracy and I will be able to work out the average.

I would try to use better equipment e.g. digital thermometer so there will be less reading/human error.

The only problem I had was with the cork lid. The hole in the middle for the thermometer was too big which resulted in heat loss because there was some space for it to escape.

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Modern Physics 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 AS and A Level Modern Physics essays

  1. How temperature affects the viscosity of honey

    The honey will be kept out of the sun whilst the experiment is being carried to keep it from warming up affecting the speed at which the ball bearing will travel through the honey. Range From looking at my preliminary results I can see that the range has reached its

  2. Free essay

    The development of the modern concept of the atom, the size and nature of ...

    The second was that the atoms of one element are all exactly alike in every respect including weight but are different from the atoms of every other element. The last was that when elements combine to form compounds their atoms combine in simple numerical proportions such as one to one, two to one, and four to three.

  1. A2 OCR B (Advancing Physics) - Research and Report: Nuclear Fusion as an Energy ...

    Containing the plasma is also an important task; there is no material which can withstand such temperatures. There are two solutions to this problem, magnetic confinement and inertial confinement. Magnetic confinement stops the hot plasma from touching the container by magnetic fields which keep it moving in circular or helical

  2. A2 OCR B Advancing Physics Coursework - Research and Report - The development of ...

    The Theory of General Relativity explains that Newton's Law of Gravitation is also only approximately correct, breaking down in the presence of very strong gravitational fields. 3.1 General Relativity In general relativity, three-dimensional space and then time are woven together into a space-time fabric, explaining the effects of gravitation with curvature instead of a force.

  1. Am going to test the following insulators:- No ...

    This type of heating is called convection. Forced air heating and air conditioning are examples of heating (or cooling) by convection. This is an effective way of bringing a hot (or cold) fluid to a different area. Convection transfers heat over a distance faster than by conduction.

  2. Are Mobile Phones a danger to our health, and should they be continued to ...

    Radio Frequency signals are non-ionising, causing no known damage to the body's cell structures. The Radio Frequency beams emitted from mobile phone antennas are wide horizontally but narrow vertically. Radio Frequency intensity at ground level directly below the antenna is low, it then increases slightly just beyond the antenna and then decreases again further away from the antenna.

  1. Modern Physics - AQA GCE Physics B - Revision Notes

    If not, the regenerated signal can produce false sounds called aliasing. When sampling occurs at more than twice the signal frequency, then a reasonable signal is regenerated. * When sampling occurs at the signal frequency, there is no signal generated at all, as it would produce a constant voltage.

  2. Physics Course work 'What is the Higgs Boson'

    clustering which gave extra mass to the ex-Prime Minister, then the rumour-carrying clusters also have mass.? [2] This example explains why the ?cluster? (the Higgs Boson) should have mass while the ?ex-Prime-Minister? (the elementary particle)

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