Answer:
All of them are examples of potential energy.
Explanation:
All of the following are examples of potential energy EXCEPT Imbalance in electrical charges of molecules across a cell membrane. O Both: chemical bond (C-H) in fatty acids AND concentration gradient. O Chemical bond (C-H) in fatty acids. O Concentration gradient. O All of them are examples of potential energy.
To solve this problem we must use the concepts related to the Law of Malus and the intensity of light. The intensity of a linearly polarized beam of light, which passes through a perfect analyzer and vertical optical axis is equivalent to:
![I= I_0cos^2 \theta](https://tex.z-dn.net/?f=I%3D%20I_0cos%5E2%20%5Ctheta)
Where,
indicates the intensity of the light before passing through the polarizer
is the resulting intensity
indicates the angle between the axis of the analyzer and the polarization axis of the incident light.
Since the light has the same intensity after the first polarizer we approach the second intensity directly so
![I_2 = I_0cos^2 \theta](https://tex.z-dn.net/?f=I_2%20%3D%20I_0cos%5E2%20%5Ctheta)
Our values are given as :
![I_2 = 69.3W/m^2](https://tex.z-dn.net/?f=I_2%20%3D%2069.3W%2Fm%5E2)
![I_0 = 235W/m^2](https://tex.z-dn.net/?f=I_0%20%3D%20235W%2Fm%5E2)
Therefore replacing and re-arrange to find the angle we have
![69.3 = 235cos^2 \theta](https://tex.z-dn.net/?f=69.3%20%3D%20%20235cos%5E2%20%5Ctheta)
![0.2948 = cos^2\theta](https://tex.z-dn.net/?f=0.2948%20%3D%20cos%5E2%5Ctheta)
![\theta = cos^{-1}( \sqrt{0.2948})](https://tex.z-dn.net/?f=%5Ctheta%20%3D%20cos%5E%7B-1%7D%28%20%5Csqrt%7B0.2948%7D%29)
![\theta = 57.1\°](https://tex.z-dn.net/?f=%5Ctheta%20%3D%2057.1%5C%C2%B0)
Therefore the angle of the second polarizer with respect to the first one is 57.1°
Answer:
b) to produce electrical charges;
Explanation:
Electrical generators are used in a circuit to produce electrical charges. The flow of these charges actually produces electrical energy in a circuit which is needed and essential to power devices and gadgets.
A generator uses mechanical energy through the movement of its parts to produce electrical energy. The flow of electrons streams produces the electrical energy which helps to produce power.
A generator works on the basis of electromagnetic induction using the movement of electric charges.
To solve this problem we will resort to the concept of angle of incidence and refraction.
Since it is a reflection on a mirror, the angle provided for refraction will be equal to that of the incidence, that is, 25 °
The angle of reflation is always perpendicular to the surface so it is necessary to find the angle with respect to it.
![\theta = 90-25](https://tex.z-dn.net/?f=%5Ctheta%20%3D%2090-25)
![\theta = 65\°](https://tex.z-dn.net/?f=%5Ctheta%20%3D%2065%5C%C2%B0)
Therefore the angle of the reflected beam of light made with the surface normal is 65°
Answer by YourHope:
Hello fellow army~
Which planet is it "survivable" to walk outside in shorts, a tank top and sandals?
Earth, depending on where you are!
Have a BEAUTIFUL day~
♡♡♡♡♡♡♡♡♡♡♡♡♡♡♡♡♡♡