Well 15 is half of 30. And there are 60 minutes in an hour. Does that help. Just go by sixty.
Answer:
c. 52 rad/s
Step-by-step explanation:
Final question does not correspond with available option. The real question is: <em>What is the angular speed in radians per second?</em>
At first we assume that spin balance rotates at constant rate and convert given angular speed, measured in revolutions per minute, into radians per second:


Which corresponds to option C.