An overtone that's a whole number multiple of the fundamental frequency of a string is called a?

harmonic

Explanation:

The frequency of a wave is given by

where

n = Order

when n = 1 it is the fundamental frequency, first harmonic, first partial

n = 2 it is the first overtone, second harmonic, second partial

n = 3 it is the second overtone, third harmonic, third partial

and so on

So, the overtone is the whole number multiple of the fundamental frequency is called a harmonic.

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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