Describe a situation in which the velocity of a particle is perpendicular to the position vector ?

"Velocity always perpendicular to position vector" means that the distance from the particle of interest to the origin never changes. The question is whether such motion always traces out a circle. Counterexample: consider a plane pendulum with its pivot at the origin.

jupiter

explanation:

it is so massive and has such a strong gravitational pull its likely prevented the formation of a planet between itself and mars in the asteroid belt

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stan bts

answer; (d) spontaneous processes are characterized by the overall conversion of order to disorder;