Try to answer these questions before determining the answer with the simulation. We suggest that you write down the reasons for your answers.

1. As the contact angle increases from 10 degrees to 90 degrees, does the height of a column in a capillary increase or decrease?
2. As the surface tension decreases, does the height of a column in a capillary change? How?
3. Suppose we replace a fluid with one that is twice as dense but has the same surface tension and contact angle, does the height of a column in a capillary increase or decrease?
4. Suppose a fluid in a tube with a diameter of 1 mm exhibits capillary action (height of fluid in tube is above the surrounding liquid level). Would the same fluid exhibit a height above the surrounding fluid if the tube diameter were 1 cm?