Physics 9702/52 — October/November 2018

A student is investigating how the rate at which water evaporates varies with temperature.

It is suggested that the relationship between the volume of water evaporated per unit time $Y$ and the Celsius temperature $\theta$ of the water is

where $k$ and $s$ are constants.

Design a laboratory experiment to test the relationship between $Y$ and $\theta$.
Explain how your results could be used to determine values for $k$ and $s$.

You should draw a diagram, on page 3, showing the arrangement of your equipment. In your account you should pay particular attention to

• the procedure to be followed,
• the measurements to be taken,
• the control of variables,
• the analysis of the data,
• any safety precautions to be taken.