Answer:
1)
2)
Explanation:
1)
The intensity equation is given by:
Where:
- P is the power of the radio wave
- r is the distance from the source
2)
Now, the intensity and the electric field are related as:
Here:
- c is the speed of light
- ε₀ is the electric permittivity
- E is the electric field
We need to solve it for E.
I hope it helps you!
Answer:
Angle of refraction.
Explanation:
Refraction is simply a change in direction of light rays as it enters into another medium.
In the diagram given above, θ2 is simply the angle of refraction showing us that the light ray has changed direction as it moves from one medium to another medium.
Answer:
Acceleration is 9ms-2
Explanation:
Acceleration is volocity divide by time so we divide 45 by 5 and we get acceleration that is 9ms-2
Answer: The centripetal force.
Explanation:
Refer to the figure below.
The centripetal acceleration of the object is
a = v²/r, directed toward the center of the circular path.
where
v = the tangential velocity
r = radius of the circular path
The centripetal force is
F = (mv²)/r