To solve this problem it is necessary to apply the concepts given by Malus regarding the Intensity of light.
From the law of Malus intensity can be defined as

Where
 Angle From vertical of the axis of the polarizing filter
Angle From vertical of the axis of the polarizing filter
 Intensity of the unpolarized light
 Intensity of the unpolarized light
The expression for the intensity of the light after passing through the first filter is given by

Replacing we have that


Re-arrange the equation,

Re-arrange to find \theta 





The value of the angle from vertical of the axis of the second polarizing filter is equal to 30.2°
 
        
             
        
        
        
Answer:
a. A = 0.735 m
b. T = 0.73 s
c. ΔE = 120 J decrease
d. The missing energy has turned into interned energy in the completely inelastic collision 
Explanation:
a. 
4 kg * 10 m /s + 6 kg * 0 m/s = 10 kg* vmax 
vmax = 4.0 m/s
¹/₂ * m * v²max = ¹/₂ * k * A²
m * v² = k * A²  ⇒ 10 kg * 4 m/s = 100 N/m * A² 
A = √1.6 m ² = 1.26 m 
At = 2.0 m - 1.26 m = 0.735 m
b. 
T = 2π * √m / k ⇒ T = 2π * √4.0 kg / 100 N/m = 1.26 s
T = 2π *√ 10 / 100 *s² = 1.99 s
T = 1.99 s -1.26 s = 0.73 s
c. 
E = ¹/₂ * m * v²max = 
E₁ = ¹/₂ * 4.0 kg * 10² m/s = 200 J 
E₂ = ¹/₂ * 10 * 4² = 80 J
200 J - 80 J  = 120 J decrease
d. 
The missing energy has turned into interned energy in the completely inelastic collision 
 
        
             
        
        
        
B) millimeter, centimeter, meter, kilometer
        
                    
             
        
        
        
Breaking bond requires energy. The bond between the carbon and hydrogen is broken when the energy is absorbed. The enthalpy is defined to be the energy taken to break the one mole of the stated carbon and hydrogen bond. Thus a should be the correct answer
        
                    
             
        
        
        
There are 100 billion planets