Question: When you walk with a cup of coffee (diameter 8cm) at just the right pace of about 1 step per second, the coffee sloshes more and more until eventually it starts to spill over the top. Estimate the speed of the waves of the coffee.(adsbygoogle = window.adsbygoogle || []).push({});

Relevant Formulae:

f= 1/T

v= f * wavelength

Solution:

I am not really sure if I am doing this right... but I said since the cup has a diameter of 8cm, the wavelength of the coffee is also 8cm (not sure it this is true)....

If the above is true, all i would need to do is find the frequency. Though I am kind of confused when it says that I am walking at a pace of 1 step per second. How can a frequency be found from this?

After finding these two quanities, and multiplying, a velocity could be found...

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# Estimate the speed of the waves of the coffee

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