A coffee centrifuge? In one popular demonstration, a full cup of hot coffee is placed on...

A coffee centrifuge? In one popular demonstration, a full cup of hot coffee is placed on a platform suspended by strings to the lecturer’s hand as seen in Figure Q5.20. With some practice, the platform, coffee and all, can be made to rotate in a vertical circle. How does the coffee stay in the cup? If the rotation of the coffee and cup is sustained for some time, what would happen to any grinds that happen to be mixed in the coffee?