Unpolarized light is incident upon a system of two polaroid sheets. if a fraction of 0.161 of the inital incident light passes through the system, then what is the angle between the polaroid sheets?

55.42°

Explanation:

According to malus law of intensity when an unpolarized light of intensity is passed through a two Polaroid sheets then the intensity becomes

We have given the ratio

So

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

if they have a finite resultant