Such a theory of quantum gravity would yield the same experimental results as ordinary quantum mechanics in conditions of weak gravity ( gravitational potentials much less than c < sup > 2 </ sup >) and the same results as Einsteinian general relativity in phenomena at scales much larger than individual molecules ( action much larger than reduced Planck's constant ), but moreover be able to predict the outcome of situations where both quantum effects and strong-field gravity are important ( at the Planck scale, unless large extra dimension conjectures are correct ).

In such situations, the Newtonian view is that there remains a force due to gravity which is not measured ( thus causing an apparent weight of zero ), while the Einsteinian view is that there never does exist a measurable force due to gravity, even in everyday experience.

Presentism is compatible with Galilean relativity, in which time is independent of space but is probably incompatible with Lorentzian / Einsteinian relativity in conjunction with certain other philosophical theses which many find uncontroversial.

Equivalently, in Einsteinian gravity, the tidal force is the effect of the diverging bodies following different paths in the negatively curved spacetime around the larger body.

This is known as gravitational lensing, and is a consequence of Einsteinian warped space-time.

* Professor Shaggy Dog-A mad scientist with an Einsteinian mop of white hair who is tall, thin and bewhiskered in some episodes and short and bespectacled in others.

It is used as a tool to compare Newtonian and Einsteinian gravity in the limit in which the gravitational field is weak and generated by objects moving slowly compared to the speed of light.

The question now becomes, " Is spacetime an Einsteinian abstraction or a physical entity?

Despite the clarity of his presentation, his idea was not of Einsteinian calibre.

Newtonian ( red ) vs. Einsteinian orbit ( blue ) of a lone planet orbiting a star

Again, for early 20th century physics, the transition between the Maxwellian electromagnetic worldview and the Einsteinian Relativistic worldview was neither instantaneous nor calm, and instead involved a protracted set of " attacks ," both with empirical data as well as rhetorical or philosophical arguments, by both sides, with the Einsteinian theory winning out in the long-run.

Within the Thistledown, the field enveloped the asteroid, effectively isolating it from the Einsteinian Metrical Frame, permitting relative inertia to be ignored.

Above this speed Einsteinian physics are required to describe motion.

In Eric Flint's alternate history ( a time travel variation ) he postulates an Assiti Shard event which juxtaposes parts of our planet including the town of Grantville, West Virginia in both space and time — a twist on scientist's referring to a space-time continuum in relativisic ( Einsteinian ) physics.

For this, one has to go to the Einsteinian Unified Field Theory of the Einstein-Maxwell-Dirac System, or more generally, the Einstein-Yang-Mills-Dirac System.

Einsteinian gravity from a topological action.

Quine makes the case that the empirical study of physics has furnished apparently credible grounds for replacing classical logic by quantum logic, rather as Newtonian physics gave way to Einsteinian physics.

The term implies that classical descriptions of phenomena are lacking, and that an accurate, " modern ", description of reality requires theories to incorporate elements of quantum mechanics or Einsteinian relativity, or both.

Newtonian ( red ) vs. Einsteinian orbit ( blue ) of a single planet orbiting a spherical star.

It was possible, however, to decompose the compliance into a sum of a frequency-independent component and two viscoelastic mechanisms, each compatible with the Boltzmann superposition principle and with a consistent set of time-temperature equivalence factors.

Specifically, it can be used to test the equivalence principle, to probe dark matter, and test neutrino physics.

* the equivalence principle, whether or not Einstein's general theory of relativity is the correct theory of gravitation, and if the fundamental laws of physics are the same everywhere in the universe.

Using the principle of equivalence, Einstein concluded that the same thing holds in any gravitational field, that the rate of clocks R at different heights was altered according to the gravitational field g. When g is slowly varying, it gives the fractional rate of change of the ticking rate.

According to Newton's law of gravity, and independently verified by experiments such as that of Eötvös and its successors ( see Eötvös experiment ), there is a universality of free fall ( also known as the weak equivalence principle, or the universal equality of inertial and passive-gravitational mass ): the trajectory of a test body in free fall depends only on its position and initial speed, but not on any of its material properties.

The generalization of this statement, namely that the laws of special relativity hold to good approximation in freely falling ( and non-rotating ) reference frames, is known as the Einstein equivalence principle, a crucial guiding principle for generalizing special-relativistic physics to include gravity.

Furthermore, each Riemannian metric is naturally associated with one particular kind of connection, the Levi-Civita connection, and this is, in fact, the connection that satisfies the equivalence principle and makes space locally Minkowskian ( that is, in suitable locally inertial coordinates, the metric is Minkowskian, and its first partial derivatives and the connection coefficients vanish ).

Using the equivalence principle, this tensor is readily generalized to curved space-time.

Locally, as expressed in the equivalence principle, spacetime is Minkowskian, and the laws of physics exhibit local Lorentz invariance.

Assuming that the equivalence principle holds, gravity influences the passage of time.

However, at the current level of accuracy, these observations cannot distinguish between general relativity and other theories in which the equivalence principle is valid.

General relativity is based upon the principle of equivalence:

The likelihood principle states that all information from the data relevant to inferences about the value of θ is found in the equivalence class.

Repeated experiments since the 17th century have demonstrated that inertial and gravitational mass are equivalent ; since 1915, this observation has been entailed a priori in the equivalence principle of general relativity.

* Energy also has mass according to the principle of mass – energy equivalence.

" This was a departure from the principle of dynamic equivalence promoted in ICEL translations after the Second Vatican Council.

The true hallmark of poetry is according to Jakobson " the projection of the principle of equivalence from the axis of selection to the axis of combination ".

The development of general relativity began with the equivalence principle, under which the states of accelerated motion and being at rest in a gravitational field ( for example when standing on the surface of the Earth ) are physically identical.

Other tests confirmed the equivalence principle and frame dragging.

Einstein's principle of equivalence put all observers, accelerating in space far from gravitating bodies, or held in place against gravitation near such a body, on the same footing.

Einstein's principle of equivalence put all observers, moving or accelerating, on the same footing.

The equivalence principle, explored by a succession of researchers including Galileo, Loránd Eötvös, and Einstein, expresses the idea that all objects fall in the same way.

The simplest way to test the weak equivalence principle is to drop two objects of different masses or compositions in a vacuum, and see if they hit the ground at the same time.

Formulations of the equivalence principle include: