13 is the mode because it is the number that appears most often
:)
C. Molecules in the original disturbance disturb (move) adjacent molecules which disturb more adjacent molecules and so the wave travels.
<h3>What is wave?</h3>
A wave can be defined as a propagating dynamic disturbance of one or more quantities.
A wave can be propagated in longitudinal or transverse method.
When waves start as a disturbance (an input of energy) in a medium (water, air, the earth etc).
The energy of the disturbance is moved from the starting point to other places in the medium by molecules in the original disturbance disturb (move) adjacent molecules which disturb more adjacent molecules and so the wave travels.
Thus, the correct option is C.
"Molecules in the original disturbance disturb (move) adjacent molecules which disturb more adjacent molecules and so the wave travels".
Learn more about waves here: brainly.com/question/25847009
#SPJ1
Work done=F *s*cos theta
Work done in this case can only be in the direction in which the electrons move.Thus cos theta is multiply to find the component of the force ( acting on an object doing work) which acts in the direction of propagation on movement of the object.Anyway,as in this case ,as magnetic field act only perpendicularly (at 90°) to electric fields(those are the electrons)no work is done.This is cause at 90°,there is no component of the magnetic field exiting of force in the direction of propagation of the electric field (electrons),as cos of 90 ° is 0, no work is done by the magnetic field.(as the whole product becomes zero regardless of the force or the displacement/distance
