Measuring the gravitational constant. (new methods for estimating the strength of the gravitation force)(Physics)(Brief Article)Peterson, Ivars
Given this strong gravitational potential, it stands out as an optimal candidate for establishing an upper limit on the gravitational constant’s variation over cosmological timescales. In this scenario, we can estimate potential cosmological deviations in the past with a level of {{\dot{G}}}/{G...
Note that from a point of view of particle physics scattering, a natural expansion parameter would be the coupling constant 𝐺𝑁, or rather, its dimensionless version 𝐺𝑁𝑠−−√𝑞, with s being the invariant mass squared and q being the modulus of the exchanged momentum. Such ...
The surface of constant gravity potential,W0, that closely approximates mean sea level is known as thegeoid. If the constant normal gravity potential,U0, on the normal ellipsoid is equal to the constant gravity potential of the geoid, then the gravity anomaly on the geoid is the difference be...
We propose a testable alternative to inflation directly built in a very general class of ultraviolet complete theories of quantum gravity enjoying Weyl inv
constant, an object would be easier to accelerate in the spacecraft than where on the ground. Thus, we can determine the absolute velocity of the spacecraft by this. However, all of the attempts to explore absolute velocity have failed, and time slows down in a high-speed system has been...
Earth Semi-major Axis a = r⊕ 6378136.3m Flattening of the Earth 1/f 1.0/298.257 Angular Velocity of the Earth ω⊕ 7292115.8553 × 10−11 rad/s Earth's Gravitational Constant GM, (μ) 3.986004415 × 105km3/s2 Models for gravitational perturbations are spherical harmonic expansions of the...
in Fundamental Theories of Physics 87–130 (Springer, 2019). Speake, C. & Quinn, T. The search for Newton’s constant. Phys. Today 67, 27–33 (2014). Article Google Scholar Adelberger, E., Heckel, B. & Nelson, A. Tests of the gravitational inverse-square law. Annu. Rev. Nucl...
is a constant which can be integrated explicitly if needed. Without a loss of generality, we can choose the coordinate system such that the orbit is on the x − yplane, and hence Lz = 0. In this case, S4(ϕ) = 0 and S3(θ) = Lθ. Finally, the equation reduces to (A.9)...
Abbott et al., A gravitational-wave standard siren measurement of the Hubble constant. Nature 551(7678), 85–88 (2017). https://doi.org/10.1038/nature24471. arXiv:1710.05835 [astro-ph.CO] NANOGrav Collaboration, Z. Arzoumanian et al., The NANOGrav 12.5 yr data set: search for an ...