<span> All of the choices were physicists, bu</span>t the answer was Ampere. The discovery that one current-carrying wire exerts a force on a second current-carrying wire was made by Andre-Marie Ampere.
This
is
true
Electromagnetic waves travel fastest through vacuum
We have that the time in seconds, minutes, and hours is



From the Question we are told that
Velocity 
Distance 
Generally the equation for the Time is mathematically given as
Therefore


And


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I believe the answer is a
Answer:
D
Explanation:
The decrease in potential energy is equal to the increase in kinetic energy.
mgh
250 x 9.8 x 30
=73, 500