Podcast
Questions and Answers
What is the relationship between excess pressure and the radius of a bubble or drop?
What is the relationship between excess pressure and the radius of a bubble or drop?
- No correlation
- Constant
- Inversely proportional (correct)
- Directly proportional
What happens when two bubbles of different sizes are put in communication with each other?
What happens when two bubbles of different sizes are put in communication with each other?
- Both bubbles maintain their original sizes
- Air rushes from the larger bubble to the smaller bubble
- Air rushes from the smaller bubble to the larger bubble (correct)
- No air transfer occurs
What is the shape of the free surface of a liquid at rest?
What is the shape of the free surface of a liquid at rest?
- Spherical
- Random
- Cylindrical
- Perpendicular to the resultant force (correct)
What is the angle of contact between a liquid and a solid defined as?
What is the angle of contact between a liquid and a solid defined as?
What is the shape of a liquid meniscus in a pure water and silver coated capillary tube?
What is the shape of a liquid meniscus in a pure water and silver coated capillary tube?
What is the primary reason why a small irregular piece of camphor floats on the surface of pure water and dances about?
What is the primary reason why a small irregular piece of camphor floats on the surface of pure water and dances about?
Why do rain drops take on a spherical shape?
Why do rain drops take on a spherical shape?
What happens to the surface tension of a liquid as its temperature increases?
What happens to the surface tension of a liquid as its temperature increases?
Why does oil spread on cold water but remain as a drop on hot water?
Why does oil spread on cold water but remain as a drop on hot water?
Why do the hairs of a shaving brush or painting brush stick together when taken out of water?
Why do the hairs of a shaving brush or painting brush stick together when taken out of water?
When n small drops of radius r coalesce to form a big drop of radius R, what happens to the surface area of the liquid?
When n small drops of radius r coalesce to form a big drop of radius R, what happens to the surface area of the liquid?
What is the formula for the amount of surface energy released when n small drops of radius r coalesce to form a big drop of radius R?
What is the formula for the amount of surface energy released when n small drops of radius r coalesce to form a big drop of radius R?
What happens to the temperature of a big drop if the released energy is absorbed by it?
What happens to the temperature of a big drop if the released energy is absorbed by it?
What is the excess pressure inside a bubble or drop due to?
What is the excess pressure inside a bubble or drop due to?
What is the formula for the velocity of a big drop if the released energy is converted into kinetic energy?
What is the formula for the velocity of a big drop if the released energy is converted into kinetic energy?
What happens to the surface energy of a liquid when its surface area decreases?
What happens to the surface energy of a liquid when its surface area decreases?
Why do soap films exhibit colorful patterns?
Why do soap films exhibit colorful patterns?
What is the primary reason for work being done against surface tension when a liquid is stretched?
What is the primary reason for work being done against surface tension when a liquid is stretched?
When a large drop of liquid splits into smaller droplets, what happens to its surface area?
When a large drop of liquid splits into smaller droplets, what happens to its surface area?
What is the primary reason for the formation of bubbles in a liquid?
What is the primary reason for the formation of bubbles in a liquid?
When a soap film is stretched, what happens to the surface energy of the film?
When a soap film is stretched, what happens to the surface energy of the film?
What is the primary reason why a bubble or drop tends to contract?
What is the primary reason why a bubble or drop tends to contract?
What is the work done against surface tension when a big drop of radius R is formed from n small drops of radius r?
What is the work done against surface tension when a big drop of radius R is formed from n small drops of radius r?
What happens when a big drop of radius R is formed from n small drops of radius r?
What happens when a big drop of radius R is formed from n small drops of radius r?
What is the change in temperature of a big drop when the released energy is absorbed by it?
What is the change in temperature of a big drop when the released energy is absorbed by it?
When a big drop of radius R breaks into n small drops of radius r, what happens to the surface energy of the liquid?
When a big drop of radius R breaks into n small drops of radius r, what happens to the surface energy of the liquid?
What is the direction of the resultant force at the point of contact between a liquid and a solid, when the angle of contact is obtuse?
What is the direction of the resultant force at the point of contact between a liquid and a solid, when the angle of contact is obtuse?
What is the shape of the soap film formed when two identical circular frames are placed in parallel and separated by a small distance, with the frames being dipped in a soap solution?
What is the shape of the soap film formed when two identical circular frames are placed in parallel and separated by a small distance, with the frames being dipped in a soap solution?
When a liquid drop is split into two smaller drops, what is the relationship between the work done against surface tension and the change in surface area?
When a liquid drop is split into two smaller drops, what is the relationship between the work done against surface tension and the change in surface area?
What is the condition for a bubble to be stable in a liquid?
What is the condition for a bubble to be stable in a liquid?
