Answer:
true
Explanation:
Area = πr²
Differentiating in respect to r
we get,
dA/dr = 2πr
using chain rule,
since r = 4feet
so ,
2π(4) = 8π
Answer:
71.56°
Explanation:
I₀ = Intensity of unpolarized light
θ = Angle between the axis of the filter and polarization direction
Intensity of polarzied light
Here, the light that is transmitted is reduced by 10% that means
I=0.1I₀
So,
∴ The angle between the axes of the polarizer and the analyzer is 71.56°
The forces are equal to each other, if there is no net force then there is no acceleration taking place. This object could be moving at constant velocity or just be still in place