Sound

The sound of an object has 120 vibrations per minute. What is the frequency and time period?

• 60 Hz & 0.167 seconds

• 3 Hz & 0.33 seconds

• 5 Hz & 0.2 seconds

• 2 Hz & 0.5 seconds

Which of the following is the inverse of time period?

• Amplitude

• Frequency

• Pitch

• Quality

Sound waves travel the FASTEST through _____________.

• gases
• liquids
• solids

Sound is caused by....

• molecules
• vibrations
• people
• space

What is frequency?

• the number of vibrations per second
• how high or low a sound is
• the loudness or softness of a sound
• the back and forth movement of matter

Sound does not travel in space because

• Space is too far away.
• There is no matter in space.
• Space is the final frontier
• Space has planets.

Speed of light in air is:

• 5100 m s^-1

• 3*10⁸m s^-1

• 330 m s^-1

• 3*10¹⁰ m s^-1

Which of the following would you hear as a low pitched sound? 

• sound wave with a frequency of 50 Hz
• sound wave with frequency of 10,000 Hz
• sound wave with an intensity of 10 dB
• sound wave with an intensity of 100 dB

High pitch sounds are caused by a ______ vibration

• fast 
• slow
• hard
• soft

If a sound has a high amplitude then it also has a ____________!!!

• fast echo
• slow pitch
• high volume
• low volume