Method for Thermal Insulation?
Start by assembling apparatus, placing heater into top of block
Measure initial temperature of aluminium block from thermometer
Turn on power supply and start stopwatch
Take several periodic measurements, eg. every 1 minute of voltage and current, calculating an average for each at the end of the experiment up to 10 minutes
5) Switch off the power supply, stop the stopwatch and leave the apparatus for about a minute. The temperature will still rise before it cools
6) Monitor the thermometer and record the final temperature reached for the block
