A 5.3 kg block initially at rest is pulled to the right along a frictionless, horizontal surface by a constant horizontal force
2 answers:
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Answer:
mark two options:
B. TSN and ISW
D. ISN and TSW
Explanation:
Recall the definition of vertical angles as: <em>those angles opposed by the vertex, and which are the result of two lines that intersect</em>.
In the figure given there are two pairs such angles, one pair I depicted in red, and the other one in blue, while the intersecting lines are shown in green. Notice that when two lines intersect, there are always two pairs of vertical angles being generated.
Therefore, according to the notation given, two boxes need to be checked in the set of options:
1) the one corresponding to : TSN and ISW (blue ones in the attached image)
and
2) the one corresponding to ISN and TSW (red ones in the attached image)
A) The magnetic field doubles as well
The relationship between rms value of the electric field and rms value of the magnetic field for an electromagnetic wave is the following:
where
E_rms is the magnitude of the electric field
c is the speed of light
B_rms is the magnitude of the magnetic field
From the equation, we see that the electric field and the magnetic field are directly proportional: therefore, if the rms value of the electric field is doubled, then the rms value of the magnetic field will double as well.
B) The intensity will quadruple
The intensity of an electromagnetic wave is given by
where
c is the speed of light
is the vacuum permittivity
is the peak intensity of the electric field
The rms value of the electric field is related to the peak value by
So we can rewrite the equation for the intensity as
we see that the intensity is proportional to the square of the rms value of the electric field: therefore, if the rms value of the electric field is doubled, the average intensity of the wave will quadruple.