Speed of Sound

The video explains the speed of sound, typically 343 m/s in air at 20°C, and how it varies with conditions. Sound travels faster in water and even faster in solids due to stronger particle interactions. Temperature increases speed as molecules move faster, while elasticity and density of the medium also play roles. Helium, being lighter than air, allows sound to travel faster. Overall, the speed of sound is influenced by multiple factors, making it impossible to define a single speed.

What is the speed of sound in air at 20°C?

• 400 meters per second

• 300 meters per second

• 250 meters per second

• 343 meters per second

How does temperature affect the speed of sound?

• It decreases the speed

• It has no effect

• It increases the speed

• It makes the speed constant

What role does elasticity play in the speed of sound?

• It slows down the sound

• It has no impact

• It allows sound to pass more quickly

• It makes sound waves disappear

Through which medium does sound travel the fastest?

• Solids

• Vacuum

• Liquids

• Gases

Why does sound travel faster in helium compared to air?

• Helium is denser than air

• Helium molecules are heavier

• Helium is a solid

• Helium molecules require less energy to move