Consider the Candle in a Jar Experiment.
-place a candlestick in a bowl of water
-light the candlestick, place a jar over the candlestick and into the bowl
-candlestick flame goes out. Water level in the jar begins to rise until it reaches a steady state.
Develop an equation to predict the FINAL HEIGHT OF WATER IN THE JAR expressed as a FRACTION OF THE JAR HEIGHT above the surrounding water. Use (and state) any assumptions necessary (including atmospheric pressure and temperature, volume of jar, size/amount of water in bowl, etc).