Give scientific reasons .
1. ‘G’ is called universal gravitational constant.
Answers
Answer:
Values of G Units
Values of G Units6.67430(15)×10−11[1] m3⋅kg–1⋅s–2
Values of G Units6.67430(15)×10−11[1] m3⋅kg–1⋅s–24.30091(25)×10−3 pc⋅M⊙–1⋅(km/s)2
The gravitational constant (also known as the universal gravitational constant, the Newtonian constant of gravitation, or the Cavendish gravitational constant),[a] denoted by the 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 general theory of relativity.
Answer:
G is called universal gravitation constant because its value i.e. 6.67 × 10-¹¹ Nm²kg-² is constant throughout the Universe.
Notation for the gravitational constant
value of G unit
6.674 30(15) × 10-¹¹[¹] m³.kg-¹.s-²
4.300 91 (25) × 10-³ pc.Mpc.M-¹.(km/s)²
the gravitational constant (also known as the universal gravitational constant the Newtonian constant of gravitation or the Cavendish gravitational constant)[a] denoted by the letter g, is an empirical physical constant involved in the calculation of gravitational effect in sir Isaac Newton's law of universal gravitation and in Albert Einstein general theory of relativity.
in Newton's law is the proportional 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 equation it quantifies the relation between the geometry of space time and energy momentum tensor (also referred to as the stress energy tensor)
the measured value of the constant is known with some certainty of four significant digits .in Sl unit , it's value ie approximately
6.674 × 10-¹¹ m³ .kg-¹ .s-²[¹]
the modern notation of Newton's Law involving G was introduced in the 1819s by c. v. boys the first implicit measurement with an accuracy within about 1% is attributed to Henry Cavendish in a 1798 experiment [b].
