A 15.0-m rope is pulled taut with a tension of 140 N. It takes ...

[kellyjaisingh]

A 15.0-m rope is pulled taut with a tension of 140 N. It takes 0.545 s for a wave to propagate along the rope. What is the mass of the rope?
 
  A) 1.67 kg
  B) 2.10 kg
  C) 2.77 kg
  D) 5.09 kg
  E) 3.19 kg

Question 2

The energy density of an electromagnetic wave is
 
  A) entirely in the electric field.
  B) entirely in the magnetic field.
  C) 1/4 in the electric field and 3/4 in the magnetic field.
  D) 1/4 in the magnetic field and 3/4 in the electric field.
  E) equally divided between the magnetic and the electric fields.

[shailee]

Answer to Question 1

C

Answer to Question 2

E

[kellyjaisingh]

Wow, this really help

[Viet Thy]

Excellent