The electrical symbols are very important especially when fixing electrical appliances because it tells you where the wire of neutral and live go.
Answer:
yes; yes
Explanation:
Phases of the moon refers to the shapes of the moon due to the lit part of it visible from the Earth. On a new moon day, the moon comes between the sun and the earth such that the lit portion is not visible from the Earth. On a full moon day, the earth comes between the sun and the moon and the whole lit part is visible.
When one would view the earth from the moon, the earth would also be visible as going through the phases. The order would be reversed. Understand this with the following example, On a new moon day, the Earth would be visible completely lit from the moon. So it will be full Earth day on the moon. On a full moon day, the lit side of the Earth would be completely away and hence, from the moon, new earth would be there.
Answer:
The total energy is 
Explanation:
From the question we are told that
The Poynting vector (energy flux ) is 
The length of the rectangle is 
The width of the rectangle is
The time taken is 
The total electromagnetic energy falls on the area is mathematically represented as

Where A is the area of the rectangle which is mathematically represented as

substituting values


substituting values


Answer:
speed of light in glass ≈ 1.89*
Explanation:
refractive index (n) =
.......................equation 1
refractive index (n) = velocity of light in air/ velocity of light in medium ....equ2
equate equation 1 and two;

speed of light in glass = c*sinC
=
°
speed of light in glass = 188,796,117.314 m/s
speed of light in glass ≈ 1.89*