They are both used to observe and describe matter.
A warm room. sound travels faster in places with more excited molecules.
Answer:
B. Increases
Explanation:
Momentum is given as 
. Since 
is maintained, as the velocity decreases, the momentum decreases, and similarly, as the velocity increases, the momentum increases.
Initial angular velocity wi = 0
final angular velocity wf = 2.9 x 10⁴ rev/min
wf = 2.9 x 10⁴ (2*3.14 rad)/(60 sec)
wf = 3.035 x 10³ rad/sec
time t = 3 sec
angular acceleration α
wf = wi + αt
3.035 x 10³ = 0 + α(3)
α = 1012 rad/s²
(b) angle covered is θ
θ = wi*t + (1/2)αt²
θ = 0*3 + (1/2)(1012)(3²)
θ = 4554 rad
