Two balls are placed near one another and hang down, as shown below.
Which conclusion is supported by this evidence?
Neither ball has a charge.
The balls are both positively charged
One ball is positively charged, and the other is negativ
charged
Each ball has a charge, but the type of charge is
unknown

In an experiment, how can i change human errors? be specific.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

An element becomes a positively charged ion when itloses protons. loses electrons. gains electrons. gains neutrons.