Physics Required Practical: Thermal Insulation

Includes;

- The Method (In Blue)

- Common Mistakes (In Yellow)

- Safety Notes (In Pink)

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• Created by: Hannah
• Created on: 19-03-19 15:11
• Physics Required Practical: Thermal Insulation
• 1. Measure and record the mass of the copper block in kg. Place a heater in the larger hole in the block.
• 2. Connect the ammeter, power pack and heater in series.  Connect the voltmeter across the power pack.
• 3. Use the pipette to put a small amount of water in the other hole. Put the thermometer in this hole. Switch the power pack to 12 V. Switch it on.
• 4. Record the ammeter and voltmeter readings. These shouldn’t change during the experiment. Measure the temperature and switch on the stop clock.
• 5. Record the temperature every minute for 10 minutes.
• 6. Calculate the power of the heater in watts. To do this, multiply the ammeter reading by the voltmeter reading.  Calculate the work done by the heater. To do this, multiply the time in seconds by the power of the heater.
• 7. Plot a graph of temperature in degrees celsius against work done in J. Draw a line of best fit. Take care as the beginning of the graph may be curved.
• 8. Mark two points on the line you have drawn and calculate the change in temperature (?) and the change in work done (E) between these points.
• 9. Calculate the specific heat capacity of the copper (c) by using the equation.  Repeat this experiment for blocks made from other materials such as aluminium and iron.