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Subject :NSO    Class : Class 4

Predict the duration of the following.
X : Day on Earth when Earth's rotational speed is somehow halved.
Y : Year on Earth when the distance between Earth and Sun is doubled.
Consider that all the other conditions remain the same.

A48 hrs--------365 days
B12 hrs--------730 days
C48 hrs--------730 days
D12 hrs--------365 days


Ans 1: (Master Answer)

Class : Class 1


Earth takes 24 hours for one complete rotation on its axis. If rotational speed of Earth is halved then it will complete one rotation in just double time i.e., 48 hrs. Earth completes one revolution in its orbit around Sun in about 365 days. If distance between Earth and Sun is doubled, i.e., radius of Earth's orbit is doubled then it will complete one revolution around Sun in just double time, i.e., 730 days.

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