A word that names a group of things is a noun isn't it? Because a noun is a person place or thing.
Distance is how much you traveled from begin to end so if you traveled along a road that was 500 m twice then your distance is 1000 m
displacement is change in position between your starting and ending points and since you started and ended at the same place then your displacement is 0<span />
A. Why you are reading. You need to know why you're reading, so you can understand it better.
That they are at a high level of education and to respect them
Inarticulate means not being able to speak or express clearly. In this case, Peter was inarticulate because he was angry when Mr. Dussel teases Peter about his cat which he loves very much. Not the same with Mr. Dussel who claims he is allergic to cats.
