Im not sure on the spelling but its called a dijuredo (did-jew-re-do)
one of a pair of cylindrical hardwood sticks that are used as a percussion instrument
Guiro
B = mu .I / 2 .pi .r
The description of microtubules is hollow rods or hollow cylindrical structures. They mainly help to shape and support the cell.
The Guiro is made from a hollow gourd.
Inside the hollow cylindrical electromagnet ("solenoid"), the magnetic field lines are straight, parallel to each other, and parallel to the axis of the cylinder. They get more complicated at the ends, but the above statement is good for a solenoid of infinite length, which has no ends, and is a good approximation in the center of a real one.
A musical percussion instrument (drum); usually consists of a hollow cylinder with a membrane stretched across each end.
also called core samples. reason is that they drill into the material with a hollow drill removing the core for analysys.
There isn't an answer to this question. Perhaps it needs to be re-phrased.
A cup is usually a roughly cylindrical hollow container. The circumference of a cup would be the length of a piece of string wrapped around the cylinder.
If allowed to thoroughly dry out, the pulp in the gourd evaporates, leaving only the hard, dried seeds inside. When shaken, such a gourd rattles - the basis of the percussion instrument called the "maraca".
A percussion instrument is any medium that makes a noise when beaten upon. As such everything can be regarded as a percussion instrument. Most probably in the prehistory the first percussion instrument was two rocks being beaten together, thus making a noise and a rhythm. The first "real" percussion instrument would be a drums as this is easy to do, extending a pig skin onto a hollow cylinder. So first percussion: Stones First "real" percussion: Drums