Frequency is the vibration of noise and the vibration determines the pitch, which we depend on to be a pitch or frequency we can hear. If it's too high or too low our ears can't hear it
All compounds are molecules but not all molecules are compounds. A molecule is two atoms joined together. A compound is two different atoms joined together.
B student 2 because you add
energy extracted out of liquids an atoms are left to come closer arrange themselves shorter distance and then they solidify
Answer:
Sorry don't know the answer
