Basic sound intensity

Unit for measuring Sound Intensity

• A. Joules

• B. Lambda (λ)

• C. Watts / Metre²

• D. Hertz

In which medium will sound travel the fastest?

• Air

• Water

• Steel

• Vacuum

What is vibration?

• how loud a sound is

• the back and forth movement of matter

• how high or low a sound is

• the loudness or softness of a sound

Why can't we hear sound in space?

• We wouldn't be able to take off our helmet to hear.

• Space has no mass--no gas/ no solids/ no liquids.

• It is dark in space.

• None of these.

Why do we SEE the lightning before we HEAR the thunder?

• Our eyes trick us.

• They are two separate things.

• Light travels faster than sound.

Sound moves in a _________.

• Transverse wave
• Longitudinal wave

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Sound waves travel the FASTEST through _____________.

• gases
• liquids
• solids

Tags

NGSS.MS-PS4-2

What is the range of frequencies audible to the human ear

• lower than 20 Hz

• 20 Hz - 20.000 Hz

• higher than 20.000 Hz

• 0 Hz - infinite Hz

The delay time between light of thunder and sound of thunder is 2 seconds. If the speed of sound at the air is 340 m/s, how far the thunder from you?

• 680 m

• 170 m

• 342 m

• 338 m

What are the factors that influence Sound Intensity?

• A. Distance travelled by sound wave

• B. Amplitude of sound wave

• C. Both A and B

• D. Frequency of sound wave