A student investigates the rate of cooling of hot water in a beaker. Plan an experiment to investigate the relationship between the thickness of the cardboard insulation wrapped around the beaker and the rate of cooling of the hot water in the beaker. The apparatus available includes: • a supply of hot water • a beaker • a thermometer • a supply of 1 mm thick cardboard sheets. You are not required to do this experiment. In your plan include: • any other apparatus needed • a brief description of the method, including what you will measure and how you make sure that your measurements are accurate • the variables you will control • a results table to record your measurements (you are not required to enter any readings in the table) • how you will process your results to reach a conclusion.

1. (a)A student investigates the rate of cooling of hot water in a beaker. Plan an experiment to investigate the relationship between the thickness of the cardboard insulation wrapped around the beaker and the rate of cooling of the hot water in the beaker. The apparatus available includes: • a supply of hot water • a beaker • a thermometer • a supply of 1 mm thick cardboard sheets. You are not required to do this experiment. In your plan include: • any other apparatus needed • a brief description of the method, including what you will measure and how you make sure that your measurements are accurate • the variables you will control • a results table to record your measurements (you are not required to enter any readings in the table) • how you will process your results to reach a conclusion.[6]