The Gravity of Physics

Consideration of the number of dimensions of known space and weighted orthogonality of those dimensions proposed in string theory, the issue of gravity helps to resolve several dilemmas in physics.

For the average person, physics has long had an issue with unifying the very "small" laws of quantum physics with the very "large" laws of the universe and gravity.  The desire for a unified theory is justified by a desire to accurately and correctly explain anything with a single law before it has ever been observed.  It also allows us to understand the nature of everything and to form the correct understanding of their relationships.

Engineers have faced a similar issue with requiring experimental evidence to discover the dominant forces of a system in order to simplify the calculations to solvable problems.  It turns out that in every situation some forces/effects or so much stronger than the rest, that we can safely ignore the rest and get extremely accurate results.  Unfortunately, ignoring insignificant forces makes it very difficult to understand the true nature of space, particles, energy, etc.

Astrophysicists have struggle for decades with the expansion of the universe and dark matter and dark energy.  This indicates that even using the laws that we have developed for a particular application, while ignoring lesser influences, our misunderstanding is great enough to lead our conclusions to great errors.  The benefit of a complete understanding seems to apply to every question which deviates significantly from our current solution sets, which is practically all new technology and research.

The traditional 4 dimensions of space, which consists of x, y, z, and t in cartesian coordinates develop the question: Is it possible for the current 3D model of space to include more dimensions?

Gravity is oftentimes compared to a membrane upon which masses may be placed.  The masses stretch the membranes downwards with steeper slopes closer to the masses, and continuing a long distance out.  Thus the membrane is another dimension.  But gravity is just another force created by the effect of matter by its very nature on each other.  How many other forces create dimensions also?  And what does this mean about dimensions or weighted dimensions like String Theory?