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Physics Lab Report - Measurements - Thermometers, Densities, etc. with Diagrams

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Introduction

Physics – Measurements Lab Report

-Rohan M XB

Measuring Temperature with Analogue & Digital Thermometers

Aim:

To find the level of accuracy and the more accurate measuring instrument between the analogue and digital thermometers, by measuring the temperature of water.

Apparatus:

  • Tap water
  • Digital thermometer
  • Analogue thermometer
  • Beaker
  • Paper
  • Pen

Method:

  1. Fill the beaker with tap water
  2. Place the digital thermometer in the beaker with water
  3. Record the temperature from the digital thermometer
  4. Take the analogue thermometer and place it in the beaker
  5. Record the temperature given by the analogue thermometer

Diagrams:

(with analogue thermometer)               (with digital thermometer)image01.pngimage02.png

Results:

Instrument used

Temperature (˚C)

Analogue Thermometer (±0.1˚C)

28˚C

Digital Thermometer (±0.01˚C)

27.5˚C

Conclusion:

The digital thermometer was the more accurate instrument, with a more accurate reading to 1 decimal

...read more.

Middle

Object (cube)PenPaper

Method:

  1. Check for a zero error in the vernier calliper
  2. If positive or negative zero error present, record the zero error
  3. Take the cube and place it between the jaws of the vernier callipers
  4. If zero error was present, subtract the zero error to get the actual value
  5. Record the diameter of the cube
  6. Take the cube and measure the diameter using a metre rule
  7. Record the diameter of the cube

Diagrams:

(with vernier calliper)image03.png

(with metre rule)

image04.png

Results:

Instrument used

Diameter (cm)

Vernier Calliper (±0.005 cm)

1.87 cm

Metre Rule (±0.05 cm)

1.8 cm

Conclusion:

The vernier calliper is a more accurate instrument. The readings are also seen to be more accurate on the vernier calliper, as they are to 2 decimal places, while the readings from the metre rule are to 1 decimal place. I can conclude that the diameter of the vernier calliper is 1.87 cm.

Evaluation:

  • A parallax error may have taken place; eyes must be directly above the reading of the vernier calliper and metre rule
  • There was an uncertainty on the vernier calliper of ±0.005 cm and on the metre rule of ±0.05 cm

Measuring Mass and Volume Using Lab Equipment

Aim:

To measure the mass and volume of an object using lab equipment. This can be further used to calculate the density.

Apparatus:

  • Object (cube)
  • Digital Balance
  • Measuring Cylinder
  • Water
  • Pen
  • Paper
  • Calculator
...read more.

Conclusion

3 )image00.pngTo calculate the density, use the formula:

Diagrams:image05.png


image06.jpg

(measuring mass on a digital balance)                (measuring volume using measuring cylinder)

Results:

Volume using measuring cylinder (±0.1cm3)

6 cm3

Volume using mathematical  method (1.873=6.539203)

(Uncertainty =(0.005 cm3 = ±0.000000125 cm3)

6.54cm3

Mass using digital balance (±0.001g)

24.92 g

Density = m/v = 24.92g/6.54cm3 = 3.81g/cm3

3.81g/cm3

Conclusion:

Using the mass and volume derived, we can then calculate the density. This was calculated to be 3.81g/cm3.  The measuring cylinder is not an extremely accurate instrument, and calculating the volume using the mathematical method seemed to be very accurate.

Evaluation:

  • A parallax error may have occurred when recording the readings from the measuring cylinder.
  • There was an uncertainty on the measuring cylinder of ±0.1cm3 and on the digital balance of ±0.001g, which may have resulted in a slight error in the results.

...read more.

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