Electrons move from the potassium atoms to the sulfur atoms.
To solve this problem it is necessary to apply the concepts related to Malus' law. Malus' law indicates that the intensity of a linearly polarized ray of light that passes through a perfect analyzer with a vertical optical axis is equivalent to:
![I = I_0 cos^2(\theta)](https://tex.z-dn.net/?f=I%20%3D%20I_0%20cos%5E2%28%5Ctheta%29)
Indicates the intensity of the light before passing through the Polarizer,
I = The resulting intensity, and
= Indicates the angle between the axis of the analyzer and the polarization axis of the incident light.
There is 3 polarizer, then
For the exit of the first polarizer we have that the intensity is,
![I_2 = I_0cos^2(45)](https://tex.z-dn.net/?f=I_2%20%3D%20I_0cos%5E2%2845%29)
For the third polarizer then we have,
![I_3 = I_2 cos^{2}(45)](https://tex.z-dn.net/?f=I_3%20%3D%20I_2%20cos%5E%7B2%7D%2845%29)
Replacing with the first equation,
![I_3 = I_0cos^2(45)cos^{2}(45)](https://tex.z-dn.net/?f=I_3%20%3D%20%20I_0cos%5E2%2845%29cos%5E%7B2%7D%2845%29)
![I_3 = I_0 (\frac{1}{2})(\frac{1}{2})](https://tex.z-dn.net/?f=I_3%20%3D%20I_0%20%28%5Cfrac%7B1%7D%7B2%7D%29%28%5Cfrac%7B1%7D%7B2%7D%29)
![I_3 = I_0 \frac{1}{4}](https://tex.z-dn.net/?f=I_3%20%3D%20I_0%20%5Cfrac%7B1%7D%7B4%7D)
Therefore the transmitted intensity now is
of the initial intensity.
Time taken by the boat to accelerate is 1 min 4 s.
<h3>How to calculate the time taken?</h3>
V
- V
= 2 a X ,
a = Vf2 - Vo2 / 2 X
= (26 m/s)2 -(13m/s)2 / 2(1250m)
= 507 m2/s2 / 2.5 m = 0.203 m/s2
Solve for time using the equation with acceleration known.
Vf = at + Vo ,
t = Vf - Vo / a = 26m/s -13m/s/ 0.203 m/s2
= 64 s
= 1 min 4 s
To learn more about time, refer
brainly.com/question/25800303
#SPJ4
Answer:
Please find the answer in the explanation
Explanation:
Constant velocity is the uniform velocity. That is, the velocity is steady and it does not change. You will have a constant velocity when you maintain a certain velocity for a long time without changing it.
At constant velocity, acceleration is equal to zero.
Instantaneous velocity is the change in distance in a specific direction per specific time. It is a velocity at a certain time. It is not uniform.
Change in instantaneous velocity is equal to acceleration.
Answer:
A) No
B) Yes
C) Yes
D) Yes
Explanation:
For a Ferris wheel with constant angular speed:
- The velocity of the system at its circumference constantly varies in its direction as the tangential direction is different at each point. If his friend is sitting on the same frame of reference then with respect to his friend his velocity is zero.
- Since the angular velocity is constant, the speed for a system at its circumference will remain constant in magnitude. If his friend is sitting on the same frame of reference then with respect to his friend his velocity is zero.
- We know that centripetal acceleration is given by:
and in this case neither the radius of the system is varying nor the speed and also the center of rotation is fixed so we have the centripetal acceleration as constant in magnitude. While his friend being on the same frame of reference next to him will no centripetal acceleration with respect to him.
- The direction of centripetal acceleration will remain always towards the center of rotation of the wheel and the center remains fixed here. So with respect to his friend sitting on the same system his centripetal acceleration will always point in the same direction i.e. towards the center of the wheel.