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garytse86
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if you stir a cup of coffee, is the velocity at the centre different from the velocity outside?
My hypothesis is that the spinning liquid rises higher up the sides, thus making more contact with the container. The more liquid a container has, the higher the pitch, right? Well, assuming that I've got the correct relationship, then I would conjecture that the glass with spinning liquid returns a higher pitch than when the liquid finally slows down. Should this turn out to be true, I would draw the tenuous conclusion that the pitch is controlled by how much length of glass (to the brim) is not in contact with the liquid.Monique said:why does the pitch sound different when you tap a spoon to the bottom of a cup with spinning (hot) liquid compared to when the liquid is not spinning?
Monique said:Something else: why does the pitch sound different when you tap a spoon to the bottom of a cup with spinning (hot) liquid compared to when the liquid is not spinning?
You can actually hear the pitch change when you first stir it very well, start tapping until the vortex slows down.. it's my dad's favorite scientific experiment ;)
Stirring a cup of coffee can actually help to evenly distribute the heat throughout the liquid. This is because the motion of stirring creates friction, which transfers heat energy from the walls of the cup to the center of the liquid. Therefore, stirring can help to raise the overall temperature of the coffee.
Stirring a cup of coffee can help to mix together any ingredients, such as sugar or creamer, that may have settled at the bottom of the cup. This ensures that each sip contains the same ratio of ingredients, resulting in a more balanced and flavorful taste.
Yes, the direction of stirring can make a difference in the taste of your coffee. Stirring in a circular motion helps to evenly distribute the heat and mix the ingredients, while stirring back and forth can create a whirlpool effect that can enhance the aroma and taste of the coffee.
The length of time you stir your coffee depends on personal preference. However, a good rule of thumb is to stir for about 10-15 seconds. This should be enough time to mix the ingredients and raise the temperature of the coffee without over-stirring and causing it to become too frothy.
No, stirring does not affect the amount of caffeine in your coffee. Caffeine is a chemical compound that is dissolved in the liquid and will not be affected by the physical motion of stirring. The amount of caffeine in your coffee will depend on the type and amount of coffee beans used to brew it.