Answer:

Explanation:
The given equation is
where
denotes initial time in the stopwatch and
denotes the distance covered by car.
As the judge starts her watch at the instant the car passes the 2.0 meter mark
and the judge reads 3.9 seconds on her stopwatch when the car passes the 8.0 meter mark.
Put
in equation 

It is (C): human.
This is more like forensic sciences or biology btw.
Electromagnetic waves travel through a vacuum, Because it has an electric and a magnetic component in it.
<u>Explanation:</u>
The vibration that is created in an electric charge is the cause for the creation of an electromagnetic wave. The electromagnetic waves contains a magnetic and an electric component in it because of this vibration. The transportation of the energy at 3.00 x 108 m/s speed in an empty space.
The electric and magnetic components that are present in an electromagnetic wave is called fields. There is a vibration at an angle of 90 degree by these fields with respect to the wave motion. The light speed remains unchanged.
The word "Everything" belongs in the blank space.