How do some Insects Walk on Water? + more videos | #aumsum #kids #science #education #children

TL;DR

Insects walk on water due to surface tension. Nuclear fusion in the sun produces energy. Ultrasound in sonar for depth.

Transcript

It's AumSum Time. How do some insects walk on water? They do not walk. They catwalk. No. Water has an unusual property. What is that? Each water molecule is attracted by other molecules around it in all directions. But since the molecules at the surface have no molecules above them. They get attracted inward more strongly. These inward forces of at... Read More

Key Insights

• 💦 Insects like water striders walk on water due to surface tension.
• 😎 Nuclear fusion in the sun produces energy released as sunlight.
• 😒 Sonar uses ultrasound with high frequencies for depth detection.
• 🤒 Clinical thermometers with a kink provide accurate body temperature readings.
• 🤔 Two thin blankets trap air between them, retaining body heat better.
• 🫢 Knuckles pop due to dissolved gases forming a bubble in the synovial fluid.
• 😃 Animals' eyes glow in the dark due to a reflective layer below the retina.

Questions & Answers

Q: Why is nuclear fusion not used to generate electricity?

Nuclear fusion requires high pressure and temperature conditions, making it challenging to replicate on Earth for power generation.

Q: Why is a laboratory thermometer not used to check body temperature?

A clinical thermometer with a kink prevents mercury from falling back, providing accurate body temperature readings unlike a laboratory thermometer.

Q: Why are two thin blankets warmer than one thick blanket?

Two thin blankets trap air between them, an insulator, preventing body heat loss, unlike a thick blanket that allows heat to escape.

Q: Why do knuckles pop?

Popping sound in knuckles occurs due to dissolved gases in the synovial fluid between finger joints undissolving, creating a bubble with low pressure.

Summary & Key Takeaways

• Insects like water striders walk on water due to surface tension created by inward forces of attraction.

• Nuclear fusion in the sun generates energy through the fusion of two hydrogen atoms into helium.

• Ultrasound is used in sonar due to its high frequency enabling depth detection.