Answer:
option C
Explanation:
The correct answer is option C
When the ray of light pass from higher refractive index to lower refractive index then the light bend away from the normal.
when the refracted ray is parallel to the boundary of the medium, θ₂ = 90°
and the incident angle θ₁
so, the angle θc is known as the critical angle.
At critical angle the refracted ray becomes parallel to boundary surface.
121 is the answer to your question
Answer:
B: It is moving north.
Explanation:
We are told that a train is moving with a velocity of 70 km/h.
Now, we are also told that the positive direction is north.
This means that the train is moving in the northern direction.
We can't say if it is speeding up or not because we are not given the acceleration.
Thus, option B is correct
A dummy is fired vertically upward from a canon with a speed of 40 m/s. How long is the dummy in the air? What is the dummies maximum height?
v=u-at
0=40-10xt
t=4 secs
height = ut-1/2at^2
height= 40x4-1/2x10x4^2
height = 160-5x16
height=160-80=80m
Answer:
The Outer Space Treaty, formally the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies, is a multilateral treaty that forms the basis of international space law.
Explanation:
