It would be A. 10 Hertz
A average human can hear between only 20Hz - 20,000Hz
Explanation:
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Explanation:
A molecule can be made up from same or different elements. Whereas a compound will have different atoms.
Therefore, the difference between a molecule and a compound is that a compound is made up of atoms from different elements.
For example, is a molecule and NaCl is a compound.
And a chemical change creates a new substance.
Answer:
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Explanation:
The wheel and axle is a simple machine consisting of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other.