Question:

Quick science help? thanks!

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1: Why doesn't sound travel through a vacuum?

Sound is a waveform in matter, and there is no matter in a vacuum

Vacuums absorb most of the sound

It does travel in space, as verified on Star Trek

2: How do you make sounds from your vocal chords?

Vocal chords act like tiny loudspeakers, vibrating and forcing sound out your mouth

Air from your lungs passes over the vibrating vocal chords, making sound

It is a myth that your sound comes from vocal chords; it comes from your chest

3: What happens when you blow across the top of a bottle?

The top of the bottle gets cold, making a squeaking sound

Air starts to circulate and vibrate in the bottle, making a sound

You must blow into the bottle for anything to happen

4: What would the beat frequency be if you added tones of 880 Hz and 882 Hz?

2 Hz

881 Hz

1762 HZ

5: Why can’t you hear an echo from a curved wall?

Not much sound reflects directly back to you

The sound is diffracted

Curved surfaces absorb the sound

thanks!!

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2 ANSWERS


  1. 1. Sound etc

    2. Air from

    3. Air starts

    4. 2

    5. Not much


  2. 4.  2 Hz  (this is 882 - 880)

    Rest of the questions:  like the guy above said

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