The value of gravitational constant was first experimentally determined by …………
a) Albert Einstein
b) Isaac Newton
c) Henry Cavendish
d) Galileo
Explanation: The value of gravitational gravitation was first
experimentally determined by Henry Cavendish in year 1798.
The nearest star to earth is………….
a) Barnard’s star
b) Proxima centauri
c) Alpha centauri
d) Luyten
The determination of ………helped scientists to
calculate the mass of earth, sun, and other celestial bodies.
a) Gravitational acceleration (g)
b) Gravitational constant (G)
c) Radius of planets
d) all of these
The unit of gravitational constant (G) is………
a) Nm2kg2
b) Nmkg2
c) Nm2kg
d) Nm2kg-2
The value of radius of earth is …………….
a) 6.4×106m
b) 6.4×103km
c) 6.4×102miles
d) 6.4×1024cm
Explanation: Radius is a distance. And The SI unit of distance is meter.
The mass of earth is approximately.…………
a) 6×1023kg
b) 6×1024kg
c) 6×1025kg
d) 6×1026kg
