Answer:
The pendulum only has potential energy.
Explanation:
A pendulum is a weight that is tied to a rope and is also suspended with a pivot and that can swing freely. Said pendulum moves at an angle of 30 degrees. Then he is released. The pendulum moves with a constant amplitude. In this way, it reaches the maximum amplitude when its angle is 30 degrees. The angles mentioned in the exercise are the extremes. At each point, the total energy is conserved. Total energy is defined as the sum of the kinetic energies plus the potential energy. The kinetic energy of the pendulum is equal to zero in the extreme positions, therefore, only the total energy is equal to the potential energy.
By giving them an advice and by giving them encouraging and explaining the any theory
Answer:
the index of refraction of the coating is 1.33
Explanation:
Given the data in the question;
refraction index of interior portion of the rod η
= 1.55
angle of incidence θ
= 59.5°
From Snell's law, we know that;
η
× sinθ
= η
× sinθ
where η
is the index of refraction of the rod ( material 1 )
θ
is the angle of incidence
η
is the index of refraction in outer coating ( material 2 )
θ
is the angle of refraction
so we substitute our values into the equation;
η
× sinθ
= η
× sinθ
1.55 × sin( 59.5° ) = η
× sin( 90° )
1.55 × 0.861629 = η
× 1
1.3355 = η
× 1
η
= 1.33 { 2 decimal places }
Therefore, the index of refraction of the coating is 1.33
Answer:
I believe 0 N
Explanation:
100 to the left can be said to be -100
100 to the right can be said to be +100
+100 + -100 = 0