Suzie stands on a pedestal and touches the dome of a running van de graaf generator. in a few seconds she observes her hair standing on end. explain this observation.

a)
each hair was induced with a positive charge. each hair repels against its neighbor and stands up.

b)
each hair was induced with a positive charge. each hair is attracted to its neighbor and stands up.

c)
half of suzie's hairs were charged negative, and the other half charged positive. the different charged hairs repel each other and stand up.

d)
half of suzie's hairs were charged negative, and the other half charged positive. the different charged hairs attract to each other and stand up.

A)  

Each hair was induced with a positive charge. Each hair repels against its neighbor and stands up.

Explanation:

When we touch the Van-de-Graff generator then due to high potential of the generator the charge is induced in our hairs.

Due to induction of charge in hairs all the hairs get similar charge and this similar charge is on each hair is along its whole length.

Now due to coulombs law all hairs are repelling each other due to similar nature of charge and this repulsion against each neighboring hair will stand the hairs upwards

so correct answer will be

A)  

Each hair was induced with a positive charge. Each hair repels against its neighbor and stands up.

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)