• 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...


Chemistry Investigation

Title: - What makes an oil runny?


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.



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.


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.

    * When removing the sphere with the magnet, extra care should be taken as it could also lead to the tip over of measuring cylinder. * Situate the measuring cylinder and stand it carefully at the centre of the stand, so that it does not slip away.

  2. Investigation into the effect of temperature on viscosity

    It is important that care is taken when using the busen burner and goggles are worn whenever it is being used. The vicinity of other investigations around the work area should also be considered with care. Ball bearings, when not in use should be positioned somewhere safe as they can

  1. Practical Investigation Into Viscosity

    dyne = gcm/s2 vk = Kinetic in Stokes (vd /d) Re = Reynolds number THEN Re = 2r d s/ vd cm cm g s2 cm2 / g cm s s cm3 (all units cancel out) Or because stokes = vd /d Re = 2rs/ vk Well what does a Reynolds number mean?

  2. Measuring the Viscosity of Honey

    Then the ball bearing should be put on a balance so that its mass can be measured. Though the ball bearing is made of steel, i.e.: its density can be taken from a table, but I would rather measure its density myself, and then compare it to the table's value.

  1. Investigating the viscosity of liquids.

    Moreover, during constant speed, the net forces acting on the ball bearing is zero, and the following equation is valid and can be applied: Upthrust (U) + Viscous Drag (F) = Weight (W) 4?r3?fluidg / 3 6?r?v = 4?r3psteel g / 3 r is the radius of the sphere, ?fluid

  2. Designing a children's slide, making it exciting for the children whilst exercising safety.

    , the frictional force will have increased too until a maximum frictional force is reached and it is here when friction is said to be ' limiting'. Thus the object will begin to move. Once the object begins to move, the frictional force opposing the relative motion remains a constant value (?N, where ?

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

    probably not be the same as when it hits the ground (as demonstrated below): However, since the object is very small, the error will be very small. Since I am modelling the cylinder as a particle, I should have really measured the distances relative to the centre of mass.

  2. 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.

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