The main reason why bells are made up of metals instead of wood is because metal is much more dense than wood, meaning that it resonates at much stronger frequencies. Wood has far too much air in it to make loud noises when struck.
Answer:
2:1
Explanation:
It is given that,
The diameter of a white blood cell is 12 micrometers
The diameter of white blood cell according to a model is 24 micrometers.
We need to find the ratio of model size to actual size. It can be done as follows :

Hence, the ratio of model size to actual size is 2:1.
Because when you spill water on it, the reflection comes from the surface of the water, not the ground glass.
Answer: The resultant displacement vector is 5.6km