Answer:
Explanation:
Given that:
The conductivity of the material
= 5.0 s/m
; &
The electric field intensity of the material E = 250 sin(10¹⁰ t) V/m
(a) The conduction current density 


(b) Displacement current density 
Recall that:

∴



(c) The frequency at which
will have the same magnitude is:

By substitution


f = 90 GHz
Oceans, lakes and rivers are some
1) Acceleration of the sled
The acceleration of the sled is given by the net force acting in the direction parallel to the incline. There are two forces acting along this direction: the component of the weight parallel to the ramp (downward) and the friction (upward). Therefore, the net force acting in this direction is

And the acceleration is given by Newton's second law:

2) Normal force
The normal force acting on the sled is equal to the component of the weight perpendicular to the incline, therefore:

Answer- thermal energy :)
<span>A. distance and period of time
Hope this helps. c:</span>