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.
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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
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