The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.939 W/m2. The wave is incident u
1 answer:
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
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Answer:
The answer is "a, c and b"
Explanation:
- Its total block power is equal to the amount of potential energy and kinetic energy.
- Because the original block expansion in all situations will be the same, its potential power in all cases is the same.
- Because the block in the first case has no initial speed, the block has zero film energy.
- For both the second example, it also has the
velocity, but the kinetic energy is higher among the three because its potential and kinetic energy are higher.
- While over the last case the kinetic speed is greater and lower than in the first case, the total energy is also higher than the first lower than that of the second.
- The greater the amplitude was its greater the total energy, therefore lower the second, during the first case the higher the amplitude.