A record player rotates a record at 45 revolutions per minute. When the record player is switched off, it makes 4.0 complete turns at a constant angular acceleration before coming to rest. What was the magnitude of the angular acceleration (in rads/s2) of the record as it slowed down

The  angular acceleration is

Explanation:

From the question we are told that

      The  angular speed is

       The  angular displacement is  

From the first equation of motion we can define the movement of the record as

Given that the record started from rest

So

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms