I've heard the theory that this is because the liquid level rises around the perimeter as the tea (or coffee etc.) is stirred. This is not the case! If you start stirring, the ringing rises in pitch. Allow the cup to settle and stir again and the ringing is still high pitched.
Come on you scientists! Get your grey matter around this little oddity and impress me.
2006-11-04 20:46:28 · 6 answers · asked by D 2 in Science & Mathematics ➔ Other - Science
It's due to air bubbles (really small ones) forming in the water and rising to the surface of the cup. It doesn't have to be tea, hot water from a tap will do the same thing -
Fill a cup with really hot water from the tap and then tap the bottom of the cup inside with a teaspoon. Keep tapping and the tone rises as the air bubbles in the water naturally rise to the surface. Once all the bubbles have gone and the liquid is totally clear the tone will remain constant. The same thing happens in a cup of tea, it's just that you can't see the bubbles !
2006-11-07 00:25:19 · answer #1 · answered by Timbo 3 · 0⤊ 0⤋
Hmm no person has genuinely replied your question yet.. i've got faith that is because of the way the cup resonates whilst crammed with diverse texture and density beverages. It impacts how a lot the cup can resonate once you hit it. working example, if espresso is greater dense than tea, which i've got faith that is, then the cup will probably resonate under whilst containing tea. that's the comparable as hitting a drum with a stick after which pressing your finger against the midsection of the drum and enjoying it lower back.
2016-12-17 04:29:21 · answer #2 · answered by ? 4 · 0⤊ 0⤋
You realise im going to have to go and make a cup of tea to test this theory now lol! I'll BRB after the tea is made, hopefully with a theory!!
EDIT: Mmmm this cup of tea is wonderful, but I cant confirm your obsevation, perhaps it requires bone china, I have a chunky mug :D
2006-11-04 20:49:27 · answer #3 · answered by huggz 7 · 0⤊ 0⤋
Ive noticed it does that,!
I thought it was because I had a musical cup, and stirring tuned it up,
2006-11-05 17:40:20 · answer #4 · answered by Anonymous · 0⤊ 0⤋
I've tested my coffee but it doesn't change for me. Maybe you are using a very special cup and spoon?
2006-11-04 22:44:25 · answer #5 · answered by Karin 2 · 0⤊ 0⤋
its summit to do with the heat dispersing through the material that the cup is made of causing it to be slightly different resonation!....f*kin 'el I'm a clever b*stard...lol.... Seriously, I've not a bloody scooby..
2006-11-04 20:59:22 · answer #6 · answered by Anonymous · 0⤊ 0⤋