Question

18. A thin circular ring of mass M and radius r is rotating about its
axis with a constant angular velocity 0. Two objects each of
mass m are attached gently to the opposite ends of a diameter
of the ring. The ring will now rotate with an angular velocity
[IIT 1983; MP PMT 1994, 97; MP PET 1999, 2009;
CBSE PMT 1998, 2009; BHU 1998; MP PMT/PET 1998;
Pb. PMT 2002; AIEEE​

Answer 1

Answer:

They emit less UV radiation and remain stable for long periods of time making them very favorable for exoplanets that might reside in their habitable zone. They are about four times as common as G-type stars. Some examples of orange dwarf stars are: Alpha Centauri B, Epsilon Indi.

Red Dwarfs

These stars have a prevalence of around 73%, with either spectral types K and M. Their temperatures are usually around 4.000 K, with luminosities around 0.0001 to 0.8 that of the Sun. They have a mass of 0.08 to 0.45 that of our sun and last around several trillion years.

Answer 2

Answer:

Let the final angular velocity be w

′

.

Angular momentum is conserved about center of the ring.

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