in December of 1758. Halley had used Newton's Law to predict the behavior of the comet orbiting the sun. With the advent of Cavendish's accuratevaluefor the gravitationalconstant, scientists were able to useNewton'slawfor even more purposes. In 1845,John Couch AdamsandUrbain Le Verrierpredict...
Planck time (tP) mathematically relates the speed of light (c), Planck's constant (h), and Newtonian gravi- tational constant (G) to generate a single physical unit of seconds (s), Equation (1).1-4 tP is one of the few fundamental constants that combines quantum, subatomic, ...
Concepts of Gravity(重力的概念）Gravitation is the force that pulls or attracts all bodies in the universe towards one another .The famous law of universal gravitation , first formulated mathematically by Newton states the fact that any two physical bodies attract each other . This gravitation force...
where our metricity assumption dispenses with the need for the final term in (2), and we use the Planck mass rather than the Einstein constant . Once again, we reiterate that our use of the gauge theory setup over geometric alternatives (including those which use the tetrad and spin-connec...
(1995): Determination of the gravitational constant with a lake experiment: New constraints for non-Newtonian gravity. Phys. Rev. D, 51, 4005 Article Google Scholar Hughes, V.W., Robinson, H.G., and Beltran-Lopez, V. (1960): Upper limit for the anisotropy of inertial mass from ...
the constant multipliers forXCIEandZCIEhave been expanded slightly. The ASTM D1925 method was withdrawn in 1995, but this formula still provides useful information. This index is always calculated forC/2 degrees, regardless of which illuminant and observer are chosen. The focus of this index was...
“Detecting gravitational diffusion” we show that the latter effect causes imprecision in measurements of mass such as those undertaken in the Cavendish experiment49,50,51or in measurements of Newton’s constant “BigG"52,53,54. The precision at which a mass can be measured in a short time,...
Here, we computed this gravity correction for a constant value of the Moho density contrast. The Moho gravity correction for the constant Moho density contrast and the corresponding mantle gravity disturbances are presented in Fig. 10. Differences between values of the Moho gravity correction computed...
Proportional negative bias was noted for refractometer results compared to estimated specific gravity from total solids and a constant negative bias compared to pycnometer results. The two refractometers designed for cat urine reported similar and lowest specific gravity results with a mean negative bias...
If gi, is constant in magnitude and direction throughout the body, then W=∑Wi=(∑mi)g=mg relates the total mass and total weight of the body. Let us apply this result to x¯, the x coordinate of the center of gravity, in Eq. 10.4. We have x¯=∑Wixi∑Wi=(∑mixi)g(∑mi...