If the intensity of an electromagnetic wave is 80 MW/m2, what ...

[jon_i]

If the intensity of an electromagnetic wave is 80 MW/m2,
 
  what is the amplitude of the magnetic field of this wave? (c = 3.0 x 108 m/s, 0 = 4  10-7 T  m/A, 0 = 8.85  10-12 C2/N  m2)
  A) 0.82 mT B) 0.33 T C) 10 T D) 0.58 mT E) 14 T

Question 2

A 10-m uniform beam weighing 100 N is supported by two vertical ropes at its ends. If a 400-N person sits at a point 2.0 m from the left end of the beam, what is the tension in each rope?
 
  What will be an ideal response?

[yuyiding]

Answer to Question 1

A

Answer to Question 2

370 N (left rope), 130 N (right rope)

[jon_i]

Thanks

[yuyiding]

Welcome