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Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

Consider the following statements regarding rotational motion about a fixed axis: (A) Only those components of external torques that lie along the axis of rotation can cause the body to rotate about the axis. (B) Torques perpendicular to the fixed axis are balanced by the constraint forces exerted by the hinges/supports. (C) Forces parallel to the axis of rotation produce non-zero torque about that axis. (D) The rate of work done by an external torque \( \tau \) rotating a body with angular speed \( \omega \) is given by \( P = \tau \omega \). How many of the above statements are correct?

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Biology · STRUCTURAL ORGANISATION IN ANIMALS

Match List-I with List-II regarding the reproductive and excretory structures in male and female frogs: List-I List-II A Mesorchium I Transfers sperms from testis into kidneys (10-12 in number) B Vasa efferentia II Canal inside kidney that receives vasa efferentia C Bidder’s canal III Double fold of peritoneum attaching testes to kidneys D Oviduct IV Opens separately into the cloaca without connecting to kidneys Choose the correct answer from the options given below:

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