Question

1universal gravitational constant

Answer 1

The gravitational constant G is a key quantity in Newton's law of universal gravitation.

The gravitational constant (also known as the "universal gravitational constant", the "Newtonian constant of gravitation", or the "Cavendish gravitational constant"[1]), 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.The measured value of the constant is known with some certainty to four significant digits. In SI units its value is approximately 6.674×10−11 N·kg–2·m2.