Explanation:
The word BOOK; is made up of 4 letters and each actually represents the symbol of an element.
An element is a distinct substance that cannot be split-up into simpler substances.
B - Boron
O - Oxygen
O - Oxygen
K - Potassium
We can see that the word BOOK shows us elements boron, oxygen, oxygen and potassium.
0.074Hz is the answer to that
139.850 there ya go hope u ace it
Answer: either air/water or air/diamond
Explanation: got air/glass wrong