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

# Physics lab on calculation of copper density using different equipment

Extracts from this document...

Introduction

PHYSICS LABS-2

In this experiment I calculated the density of copper, using my knowledge of the propagation of errors I was able to arrive on a fairly accurate answer. The primary objective of this experiment was to use our prior knowledge of uncertainties to come to the most accurate conclusion to the density of the metal in the given wire.

My research question was to estimate the density of the metal in the particular wire.

I was given a small piece of copper wire, string, a micrometer screw gauge, a ruler, a weighing balance. The theory behind this was that, using the given instruments we could calculate the diameter, weight and length of the wire. This in turn would give me the density.

...read more.

Middle

Next I calculated the mass of the wire with the help of a digital weighing balance. Firstly I “reset” the balance, then I placed the wire inside and shut the glass protector. This helps to give us more accurate readings because it curbs the influence of air on the balance. I then took note of the reading and repeated this four times. Then I took the average of the readings to get the true value of the weight (in grams). The error in this case is equal to the least count of the instrument (as it is electronic). Thus the error in this case is equal to +/- 0.001 grams.

...read more.

Conclusion

Assuming that the wire was a cylinder, I calculated the volume using the formulae πr2h. The height here is the length. Substituting the respective values I got the volume as 0.00577 cm3. Next I used the formula Density = Mass/Volume. Again by substituting the values I got the density as 9.61 g/cm3.

Now for the uncertainties. To get the uncertainties of density, I first calculated the percentage error of the diameter, height and mass. The percent error of diameter is the uncertainty of d by the diameter, multiplied by 100. Similarly I calculated the percentage errors the height and mass as 0.66% and 0.18%, respectively. The percent error of diameter is 5.05%.

...read more.

This student written piece of work is one of many that can be found in our International Baccalaureate 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

# Related International Baccalaureate Physics essays

1.  ## Experiment to calculate the diameter of a piece of nichrome wire from its electrical ...

3 star(s)

was measured, shown in fig 1 above. It was assumed that this length was the same length between each opposite knobs (fig 1). The measured length was found to be 37.3cm with the ruler having an uncertainty of �0.1. Therefore, the uncertainty increases by a magnitude of �0.1 and the length increases by 37.3cm for each length trial.

2. ## Physics Wave revision question

On graph 1, draw a labelled line to indicate the amplitude of the wave. (1) (ii) On graph 2, draw the displacement of the string at (2) (Total 7 marks) 55. Wave properties (a) By reference to the energy of a travelling wave, state what is meant by (i)

1. ## Aim of the Laboratory Experiment: Understanding of propagation of light waves phenomena by using ...

The second lamp is moved until both lamellas are equally illuminated. The distance r2 is measured. Identically to step 1, the maximum residual is determined and accepted as the experimental error. The same step is repeated for two different distances - 20 and 25 cm.

2. ## Energy density experiment - Aim: To determine the energy density of ethanol

178.19 2 178.19 3 177.75 2.5 1 174.19 2 173.72 3 174.47 Sample Calculation 2. Calculating temperature of water: E.g. (values from burning 0.5g of ethanol in trial 1) Table 3. temperature of water: Amount of ethanol burnt (g � 0.005g)

1. ## DCP+CE Energy Density of Ethanol

To calculate the percentage difference between the data gained and the theoretical value; Percentage Difference = (theoretical value - data gained)/(theoretical value) x 100 = (26.8MJ/kg - 9.3MJ/kg)/(26.8MJ/kg) x 100 = (17.5MJ/kg)/(26.8MJ/kg) x 100 = 0.65298 x 100 = 65.298% = 65% There is 65% difference between the data gained and theoretical data.

2. ## Energy Density of Ethanol

The energy density of ethanol is 9.3MJ/kg with the uncertainty of 0.57MJ/kg. Quoted from 'Overview of Storage Development DOE Hydrogen Program' by George Thomas, the theoretical value of energy density of ethanol is 26.8MJ/kg. The difference between the theoretical value and data gained is 17.5MJ/kg.

1. ## HL Physics Revision Notes

The direction of the force is pointing to the centre of the circle The acceleration of a particle travelling in a circular motion is centripetal acceleration The force needed to cause the centripetal acceleration is called the centripetal force. Centripetal force does not do any work as work done = force x distance in the direction of the force.

2. ## Determining the diameter of a piece of Nichrome wire by determining its resistivity

Five trials were taken for five different lengths to obtain a reliable, wide range of data. Safety Precautions: 1. Precaution was taken so that the Nichrome wire would not hurt the finger. 2. Precaution was taken to make sure there were no fire hazards due to short-circuit. • Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to
improve your own work 