Katie rubs a balloon against her hair. Electrons from her hair travel to the balloon, giving the balloon a negative charge and her hair a positive charge.
This mages courtesy of NASA
When the negatively charged balloon is brought near the strands of Katie's hair, they move to get closer to the balloon, without the
balloon actually touching them. This shows that

increases it

their crystal patterns have been disrupted by stress

report!

explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."