You did not put the options but I do know copper is a good conductor and allows electrons to easily move through it because it is in wires.
Downward movement under the force of gravity only.
Answer:
1.6031 miles
Explanation:
Given the following data;
Speed = 344 m/s
Time = 7.5 seconds
To find how many miles away was the lighting strike;
Mathematically, the distance travelled by an object is calculated by using the formula;
Distance = speed * time
Distance = 344 * 7.5
Distance = 2580 meters
Next, we would have to convert the value of the distance travelled in meters to miles;
Conversion:
1609.344 metres = 1 mile
2580 meters = X mile
Cross-multiplying, we have;
X * 1609.344 = 2580
X = 2580/1609.344
X = 1.6031 miles
They use them when they want to prove something right. They analyze their data and make sure everything is correctly written down and there's no mistakes. Otherwise, the technology they create, will not work and there could be a slight chance that they got one tiny miscalculation and it offsets everything they wanted to be in the technology.