Weight is based on density mass is not.
The process of evaluating evidence to form an attitude should be called Cognitive evaluation.
Answer:
Explanation:
Given
mass of balls 

angular velocity 
Length of Rod 
Tension in the Second half of rod



For First Part





Answer:
Explanation:
Let the incident intensity of light on the polariser is Io.
Let the angle of transmission is θ.
According to the law of Malus,
The intensity of light coming out form the polariser is given by
I = IoCos²θ
The mean or the average value of Cos²θ is 1/2
So, the intensity of light coming out from the polariser is
I = Io/2
Thus, the 50% of light is transmitted by the polariser.
vf=vi+at
8.77=vi+1.77 x 3.33
8.77 = vi+5.8941
vi=2.8759
vf²=vi²+2ad
8.77²=2.8759²+2x 1.77 x d
76.9129=8.27 + 3.54d
d=19.39 m