Acertain cd has a playing time of 76 minutes. when the music starts, the cd is rotating at an angular speed of 4.10 × 10 2 4.10×102 revolutions per minute (rpm). at the end of the music, the cd is rotating at 2.90 × 10 2 2.90×102 rpm. find the magnitude of the average angular acceleration of the cd. express your answer in rad/s².

average acceleration =   2.74 x 10⁻³ rad/s²

Explanation:

given,

CD playing time = 76 minutes

initial angular speed of CD = 4.10 × 10² rev/min

                                             =

                                             = 42.9 rad/s

final angular speed of CD = 2.90 × 10² rev/min

                                           =

                                           = 30.37 rad/s

average acceleration =

                                   =  

average acceleration =  0.00274 rad/s²

average acceleration =  2.74 x 10⁻³ rad/s²

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is