This should help,
Search up the Scientific method and lookup for the meaning of each word.
I can't help with all of it but this should help for most
Answer: 
Explanation:
Given
CD has a playing time of 
Initial angular speed of CD is 
Final angular speed of DC is 
Angular speed, when rpm is given
Final speed
Using equation of angular motion
Insert the values
Magnitude of angular acceleration is
Answer:
Δω = -6.00 rad/s
α = -2.61 m/s²
Explanation:
Step 1: Data given
A bicycle tire is spinning counterclockwise at 3.00 rad/s
Δt = 2.30 s
In theopposite (clockwise) direction, also at 3.00 rad/s
Step 2: Calculate the change in the tire's angular velocity Δω
Δω = ωf - ωi
ωf = - 3.00 rad/s
ωi = 3.00 rad/s
Δω = ωf - ωi = -3.00 - 3.00 = -6.00 rad/s
Step 3: Calculate the tire's average angular acceleration α
α = Δω / ΔT
α = -6.00 rad/s /2.30s
α = -2.61 m/s²
A negative angular acceleration means a decreasing angular velocity
The answer is D- it has a high resistance and is a conductor
hope this helps !
