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2 cards from this section. Quick, good the night before a test.
What is the formula for calculating pressure difference in a bubble?
Think about the role of surface tension in this context.
Define surface tension.
Consider the properties of liquids.
What is the primary cause of surface tension in liquids?
Consider how molecules interact at the surface.
True or False: The pressure difference inside a droplet is equal to the pressure outside.
Think about the forces at play in bubbles.
Given a liquid with a surface tension of 0.072 N/m and a droplet of diameter 0.4 mm, calculate the pressure inside the droplet compared to the outside.
Use the formula carefully, remembering to convert diameter to radius.
Discuss how changes in temperature to 80°C might affect surface tension in water, and calculate the potential new pressure difference for a 0.6 mm bubble.
Check temperature tables for surface tension values.
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