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Cotton wool is NOT good for hearing protection as it only has an average attenuation of 7dB whereas you require 25-30dB in an average metal workshop for proper protection. DO NOT use cotton wool as hearing protection EVER. If one tiny little cotton fibre gets left behind you're in trouble - ear infection on the way!
an ear drum!
a model of a ear
Tone is a pure sound. Typically, a fixed frequency makes a single tone. In the ear (human) a tone stimulates (there are restrictions) only one part of the ear. What is tone in ear?
There is no such unit of measurement as a diameter. A diameter is the distance across something - which can be as big or as small as desired.
An average dwarf galaxy is small in diameter.
No, the atomic mass is the average mass of the atom and the atomic diameter is the average diameter of the atom
About 100 light-years in diameter.
it is 32cm in diameter
The average diameter of the adult windpipe (or trachea) is 2.5cm (1 inch).
The average diameter of a dwarf spheroidal galaxy is 10 kiloparsecs.
Between species the diameter of the bronchi and bronchioles vary greatly. The average length of the adult bronchus is 2.5 cm and its average diameter is 13 mm.
40mm diameter and 17mm tall (average tealight)
6778
The average diameter of an iris is 11.8mm, with the majority of the population falling between 10.2mm and 13.00mm, on the larger end.
The urethra is bigger. Ureters average 3-4mm in diameter, while urethras average 6-8mm.
The diameter of Mars is 6785 kilometers.