Two companies make baseballs, and each claims that its ball goes farther. which would be the best scientific evidence to decide which ball goes farther?

They would have to be hitting each ball with the same force and measuring how far each goes

Explanation: Reviewing the test data that each company has reported on their product is not a bad idea, but each company has a very good reason to want their ball to perform better. Each company may have tested their own balls in the very specific circumstances in which their ball performs better than the competition's. Even if the tests are accurate, they are probably not objective and realistic.

For a scientific test, only one variable should be changed at a time. The variable for this test needs to be the kind of ball, so each ball should be hit with the same force, and the distance the ball travels should be measured. A machine should probably be used to hit the balls to make sure each one is hit with the same force.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

well clustered together.

points close on a scatter diagram