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yes.if you make the right pitch
resonance
Yes.
yes, it doesn't even need to be an opera singer and the note doesnt have to be very high either, i saw a video of a guy break glass on mythbusters once.
I think the pitch would be lower because the sound is really low when it is empty.
yes.if you make the right pitch
but you cant but it wo have to be really high to break glass
You don't necessarily have to go so high to break a glass, rather it is hitting the exact same frequency of vibration that the glass has. So you would tap the glass to determine the frequency (you need someone with perfect pitch or an analyzer), and then you just have to hit that same note at the right intensity to break the glass.
resonance
you have to have a very high voice to break a glass and this is what you have to do to break a glass you can break a glass because a glass is very resonant and frequency. and you also can break a glass by holding your high voice for two or three seconds and then the glass breaks. no its impossible for just your plain high voice you have to have a high microphone (with speakers) to break a light wine glass.
Yes.
Yes. Large hail can easily break glass.
I think the pitch would be lower because the sound is really low when it is empty.
yes, it doesn't even need to be an opera singer and the note doesnt have to be very high either, i saw a video of a guy break glass on mythbusters once.
glass that can't break!
some natural forces can cause glass to break
It is unlikely that a glass will break before it hits the ground. The glass may experience tiny fractures which will cause it to break upon impact.