A substance has no mass. Can we regard it as matter?
As we know that matter can be converted to energy and energy to mass(E = MC^2), can we convert sound energy to mass?
As mentioned above , turmeric works as a indicator and turmeric gives no color when it is mixes with the acid .
So , suppose we have only turmeric and we have to find out that whether the substance in acid or neutral . So , How we can find it ?