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

What makes an oil runny?

Extracts from this document...

Introduction

Chemistry Investigation

Title: - What makes an oil runny?

Plan

I am going to investigate what properties make oil runny and also the viscosity of oils.

There are a number of variables that could influence my test some of which include,    

  • The temperature
  • Length of slope
  • Gradient of slope
  • Amount of hydrocarbons present
  • Amount of oil on the slide

I am going to test the amount of hydrocarbons in the oil. I am testing this because the other four variables would be to hard to control, such as the temperature and if I were to test the gradient I would have to measure the exact degree and have a reliable stand or propping device  to hold it. Therefore the amount of hydrocarbons is the simplest because I just use a different oil each time.

 I predict that the lower number of hydrocarbons present, the faster the oil will reach the bottom of the slide. I think this because if you

...read more.

Middle

image01.png

For the measurements I will use seconds and milliseconds and minutes if necessary. All answers will be to 2d.p and I will do each run three times.

The method is a straight forward one. I will find a solid structure that is of satisfactory height and then carefully position my slide against it making sure not to break the slide☹. Then I will drop an amount of oil onto the slide and when it reaches the start line I will begin to time. Then when it reaches the bottom I will stop timing and proceed to record the results in a table. Then I will repeat this test two more times and after that move onto another of the oils.

I have performed a pre-test with only one oil to get a wide range of results and they are as follows: On paper

  I have performed the pre-test so that I can

...read more.

Conclusion

If I obtained a separate set of results I could plot them against each other and get a contrast of the two sets.

Analysing Results

Graph on separate sheet

My graph shows that as the time of the oil is slower then the average speed decreases so it is slower. My graph slows a negative correlation when the speed is on the vertical axis and the time is on the horizontal axis.

My results support my prediction as I predicted that the longer the chain of hydro carbons was then the longer time it would take to reach the bottom of the slope.

Evaluating Results

I think that my results are quite accurate as we have compared with other groups and our results are similar.

There are no anomalous results on the graph.

My results are reliable because if another word for reliability is repeatability and we repeated them three times and they were always about the same value.

The procedure was simple but effective, the slide was a good length and we found our own angle at which to set it.

...read more.

This student written piece of work is one of many that can be found in our GCSE Forces and Motion 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 Forces and Motion essays

  1. The effect of the temperature on the viscosity of the syrup.

    The measuring cylinder will be filled with syrup up to 5cm beneath the top of the tube. This will ensure that no syrup will be spilled from the top and the surface of the syrup is high enough to allow the sphere to be released from rest.

  2. Practical Investigation Into Viscosity

    that of a mouse - the terminal velocity of a man (about 100 mi/hr) would be 25 times that of a mouse! Dropping a sphere of known size and mass in a liquid and measuring its terminal speed is one way to measure viscosity.

  1. Investigation into the effect of temperature on viscosity

    Velocity was measured at three temperatures, the first temperature used was room temperature. Marks were made at 8cm intervals down the tube one from the top and two below. The time taken to pass through each section was recorded and repeated three times.

  2. Investigating the viscosity of liquids.

    the subject): ? = 2r2 g (?steel - ?fluid) / 9v With this equation, we are now able to calculate the viscosity of glycerol using the falling ball viscometer. Aim: To investigate how temperature affects viscosity of a fluid. Prediction: It has been predicted that the viscosity of the fluid will increase at higher temperatures.

  1. Motion of an object as it slides down a slope at different angles to ...

    Using the formula Hence in a controlled experiment, with the values for the variables l, ? and h, I can hopefully obtain the value of d. At the mean time I have done a controlled experiment in a group of five.

  2. Squash Ball and Temperature Investigation

    Because the molecules are beginning to melt, when the ball is bounced, it no longer bounces back as well as when the molecules were not melted and thus we see the smoothening out of the curve on the graph as the gradient is decreased.

  1. What is the viscosity of golden syrup?

    If it is heavy, the terminal velocity may be so high it may travel through the syrup so fast I would not accurately be able to measure the time taken. I am using golden syrup as from my background knowledge I know it is very viscous at room temperature, and its viscosity will change dramatically with any temp change.

  2. What makes runny oil?

    The two marks will determine how far the ball bearing will fall in the oil. I will also be keeping the weight of the ball constant. In this experiment to make it a fair test I will need to keep the temperature of the oil the same.

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