Consider a soap bubble. Is the pressure inside the bubble higher or lower than the pressure outside? Explain with reason. 

Solution:

The pressure inside a soap bubble is higher than the pressure outside. This phenomenon is a result of the surface tension of the soapy water solution forming the bubble.

A soap bubble is essentially a thin film of soapy water encapsulating air. The surface tension of the water causes the bubble to minimize its surface area, creating a structure that requires a higher pressure inside compared to outside. This higher pressure inside the bubble is necessary to counteract the inward-pulling force of surface tension, which is trying to minimize the surface area of the bubble.

In summary, the pressure inside the soap bubble is higher because it needs to balance the forces acting on its surface, specifically the tension forces trying to minimize the surface area.