Topic
Standard gravity
About: Standard gravity is a research topic. Over the lifetime, 6 publications have been published within this topic receiving 15 citations. The topic is also known as: g & g's.
Papers
TL;DR: In this article, a unique device was described for highly accurate measurement of the absolute acceleration due to gravity using a ballistic method using stabilized lasers, a rubidium frequency standard, and a computercontrolled high-speed electronic counting system with an output of 5000 measurements per twenty four hours.
Abstract: A unique device is described for highly accurate measurement of the absolute acceleration due to gravity using a ballistic method. Using stabilized lasers, a rubidium frequency standard, and a computercontrolled high-speed electronic counting system, it was possible to achieve a relative error of 4×10–9 with an output of 5000 measurements per twenty four hours. Results are presented of determinations of the absolute acceleration due to gravity at international initial and reference gravimetric points and to investigate tidal and nontidal (secular) variations in gravity.
11 citations
12 Jul 2011
TL;DR: In this paper, the strength of the gravity field at any point on the surface of Earth should be proportional to the mass of the planet and inversely proportional to square root of two of the distance from the center of the Earth.
Abstract: Every celestial bodies including our Earth having their own gravity field which causing the attractive force towards the object near them. By assuming that the Earth is symmetrical sphere, the strength of the gravity field at any point on the surface of Earth should be proportional to the mass of the planet and inversely proportional to the square root of two of the distance from the center of the planet. The strength of gravitational force can be equalized with the acceleration of any mass in the influence of gravity and the value on the Earth surface, denoted as g, is approximated with standard average value g = 9.8 m/s2. Experiment conducted during two different solar eclipses, Total Solar Eclipse 2009 and Annular Solar Eclipse 2010. For 2009 experiment, the increment from pre-eclipse to the totality is about 18.92%. For the first and second set of experiment in 2010, showing the percentage increase of gravity acceleration from pre-eclipse to the annularity is about 7.51% and 8.59% respectively. This difference in gravity acceleration may cause chicken egg able to stand during the maximum phase of eclipses.
7 citations
2 Oct 2014
TL;DR: A new watt balance is being constructed at National Institute of Standards and Technology (NIST) in preparation for the redefinition of the International System of Units and the realization of mass through an exact value of the Planck constant.
Abstract: A new watt balance is being constructed at National Institute of Standards and Technology (NIST) in preparation for the redefinition of the International System of Units and the realization of mass through an exact value of the Planck constant. We describe the procedures used and give results for the measurements of the local acceleration of gravity in the new watt balance facility.
2 citations
8 Jun 2008
TL;DR: In this paper, the force on a reference mass for the electronic kilogram experiment was calculated using both absolute and relative gravity meters to measure the acceleration of gravity, and tests have been conducted to achieve an uncertainty of less than 1 part in 108.
Abstract: Calculating the force on a reference mass for the electronic kilogram experiment requires using both absolute and relative gravity meters to measure the acceleration of gravity. Tests have been conducted to achieve an uncertainty of less than 1 part in 108.
1 citations
Journal Article•
TL;DR: In this article, the authors constructed a model to evaluate at which radius the greatest gravitational acceleration is felt and found that this point was at the meeting point of the lower mantle and the outer core, where the acceleration peaks at a = 10.8 ms -2.
Abstract: Earth is not of uniform density, but consists of many layers, causing acceleration due to free fall to be a non-linear function of radius. A model is constructed to evaluate at which radius the greatest gravitational acceleration is felt. This point was found to be at the meeting point of the lower mantle and the outer core, where the acceleration peaks at a = 10.8 ms -2 .
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2014 | 1 |
| 2013 | 1 |
| 2011 | 1 |
| 2008 | 1 |
| 1992 | 1 |
| 1979 | 1 |