Is angular velocity and centripetal acceleration in uniform circular motion in the same direction

If you want to ask me to tell you, the direction of angular velocity is determined by the right-hand screw rule. In this way, the direction of angular velocity is perpendicular to the plane of the circle, and the direction of centripetal acceleration points to the center of the circle, so they are different

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1. Is angular velocity a vector? If so, what is the direction? Does angular velocity keep the same direction in uniform circular motion?
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