81. A rigid spherical body is spinning around an axis without any external torque. Due to change in temperature, the volume increases by 1%. Its angular speed
(a) Will increase approximately by 1%
(b) Will decrease approximately by 1%
(c) Will decrease approximately by 0.67%
(d) Will decrease approximately by 0.33%
Ans. c
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a