Force A Grand Unified Theory that allows for the combination of the electroweak interaction with the strong force is held out as a possibility with candidate theories such as supersymmetry proposed to accommodate some of the outstanding unsolved problems in physics. Physicists are still attempting to develop self-consistent unification models that would combine all four fundamental interactions into a theory of everything. Einstein tried and failed at this endeavor, but currently the most popular approach to answering this question is string theory. What we now call gravity was not identified as a universal force until the work of Isaac Newton. Before
Unified field observed in Igor Stravinsky's Russian period, such as in "Les Noces", derived from his use of folk melodies as generating material and influenced by shorter pieces by Claude Debussy, such as "Voiles", and Modest Mussorgsky. In Béla Bartók's Bagatelles, and several of Alfredo Casella's "Nine Piano Pieces" such as No. 4 'In Modo Burlesco' the close intervallic relationship between motive and chord creates or justifies the great harmonic dissonance. Unified field In music, unified field is the 'unity of musical space' created by the free use of melodic material as harmonic material and vice versa. The technique is most associated