What the previous answer was about was a ruler. That is complete nonsense. The real answer is precussion. Drums. Most all cultures have drums or some form of precussion.
stringed instruments
Most famous is a SPL meter (Sound Pressure Level).
Standard flexible tape measure
open market operations
A measuring tape should work well in most cases.
Violins. The violin is the most numerous instrument. There are (in general) two sections of violins, and both sections play the same instrument. In most cases the total number of violinists is 16 to 20.
the most popular brass instrument is the french horn. I also play it :)
Motif xf8
That is a matter of opinion
most stomatas shown on around the leaves
The most common instrument played by children between the ages of five and eighteen is the piano. guitar comes in second but it is definitely the piano!
piano
most numerous
Tigers are very popular especially in India so my guess would be about 2 million tigers in the world.
There are many fault lines around the world causing numerous disasters each day. some of the most famous are around the edge of the pacific ocean (the pacific ring of fire) such as the San Andreas faults. Chris
Most books in Europe were written in Latin. There were numerous books in the Arab World and in China that were written in other languages.
The piano replaced the harpsichord as the most dominant instrument.