Question

1.
If the distance between earth and the sun were half of its present value, then how many number
of days will be there in a year?
Hint: use T2
Røie., Kepler's third law.​

Answer 1

Explanation:

T1 = 365 days

R1 = r

R2 = r/2

T2 = T1(R2/R1)^3/2

= 365(r/2*r)^3/2

= 365(1/2)^3/2

= 365/2√2

= 365/2.8

= 130.35 days

Decrease in the number of days in one year of earth = 365 - 130.35 = 234.65 days