Question

44. How will you 'weigh the sun', that point
is estimate its mass? The mean orbital
radius of the earth around the sun is 1.5
x 108km
1x 1025kg
2 x 1030kg
3 x 1032kg
4 x 1035kg

Answer 1

Answer:

god knows...

Explanation:

find it by yourself...

Answer 2

Answer:

B) 2 × 10^30 Kg

Explanation:

Mean orbital radius of earth around the sun = 1.5×10¹¹ m

Time period (T) = 1 Yr

= 365 × 24 × 3600 s

Let mass of the sun = Ms

Mass of the planet = m

We know,

Centripetal force = Gravitational force

mv²/r = GMsm/r²

v² = GMs/r

(2πr/T)² = GMs/r

Ms = 4π²r³/GT²

Put the values of r , G , and T

Ms = 4×(3.14)² × (1.5×10¹¹)³/6.67×10^-11×(365×24×3600)

≈ 2 × 10^30 Kg