If the amplitude of a wave increases by the factor of 4 by how much does the energy increase

Which type of bond forms between water moleculesstrong bondhydrogen bondcovalent bondpolar bond

What is the problem in this article? what solution does the article propose?

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass