G value in cgs

The correct answer is option 4 i.

The gravitational constant also known as the universal gravitational constant , the Newtonian constant of gravitation , or the Cavendish gravitational constant , [a] denoted by the capital letter G , is an empirical physical constant involved in the calculation of gravitational effects in Sir Isaac Newton 's law of universal gravitation and in Albert Einstein 's theory of general relativity. In Newton's law, it is the proportionality constant connecting the gravitational force between two bodies with the product of their masses and the inverse square of their distance. In the Einstein field equations , it quantifies the relation between the geometry of spacetime and the energy—momentum tensor also referred to as the stress—energy tensor. The measured value of the constant is known with some certainty to four significant digits. In SI units , its value is approximately 6.

G value in cgs

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It is a constant defined by standard as 9. This value was established by the 3rd General Conference on Weights and Measures , CR 70 and used to define the standard weight of an object as the product of its mass and this nominal acceleration. Although the actual acceleration of free fall on Earth varies according to location, the above standard figure is always used for metrological purposes. In particular, since it is the ratio of the kilogram-force and the kilogram , its numeric value when expressed in coherent SI units is the ratio of the kilogram-force and the newton , two units of force. Already in the early days of its existence, the International Committee for Weights and Measures CIPM proceeded to define a standard thermometric scale, using the boiling point of water. Since the boiling point varies with the atmospheric pressure , the CIPM needed to define a standard atmospheric pressure. The definition they chose was based on the weight of a column of mercury of mm.

G value in cgs

The centimetre—gram—second system of units CGS or cgs is a variant of the metric system based on the centimetre as the unit of length , the gram as the unit of mass , and the second as the unit of time. All CGS mechanical units are unambiguously derived from these three base units, but there are several different ways in which the CGS system was extended to cover electromagnetism. In many fields of science and engineering, SI is the only system of units in use, but there remain certain subfields where CGS is prevalent. On the other hand, in measurements of electromagnetic phenomena involving units of charge , electric and magnetic fields, voltage , and so on , converting between CGS and SI is more subtle. Formulas for physical laws of electromagnetism such as Maxwell's equations take a form that depends on which system of units is being used, because the electromagnetic quantities are defined differently in SI and in CGS. The CGS system goes back to a proposal in by the German mathematician Carl Friedrich Gauss to base a system of absolute units on the three fundamental units of length, mass and time. The sizes of many CGS units turned out to be inconvenient for practical purposes. For example, many everyday objects are hundreds or thousands of centimetres long, such as humans, rooms and buildings. Thus the CGS system never gained wide use outside the field of science. Starting in the s, and more significantly by the midth century, CGS was gradually superseded internationally for scientific purposes by the MKS metre—kilogram—second system, which in turn developed into the modern SI standard.

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Bihar Upper Primary Teacher. Nursing Exams. UP Police. Cochin Shipyard Executive Trainee. Odisha Police Driver. Answer Detailed Solution Below Option 4 : 6. Oil India Grade 3. APCOB staff assistant. Trusted by 3. Assam Rifles. State Govt. India's Super Teachers for all govt. Chandigarh JE.