You whirl a stone in a horizontal circle in such a way that the stone is in uniform circular motion. which of the following is true for this situation?
a. the magnitude of the stone's velocity does not change.
b. the change in direction of the stone's motion is due to the centripetal force acting on the stone.
c. the stone's speed is constant. the stone is moving with constant velocity.
d. the direction of the stone's velocity changes as it moves around the circle.

A, B & D

Explanation:

Given

Stone is whirling in a horizontal circle in such a way that the stone is in uniform circular motion. This implies stone is moving with a velocity of constant magnitude though its direction is changing constantly due to centripetal acceleration .

If velocity magnitude is constant therefore its speed is also constant .

Therefore option is c is wrong and rest all are correct

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.