Answer:
90 degree hope it help :))
Answer:
The angle of incident ray is 40°.
Explanation:
Given that the angle of incident and reflected ray are the same. In this question, we had given that both angles added up will gives you 80° so you have to divide it by 2 :
incident + reflected = 80°
Let incident = reflected = θ
θ + θ = 80°
2θ = 80°
θ = 80° ÷ 2
= 40°
Answer:
Explanation:
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Decibel - the decibel is a relative unit of measurement equal to one 10th of a bel
Answer: Point A is the answer for the potential energy. Point D is the answer for the kinetic energy.
Explanation: