Pen
Pencil
Helium comes first because elements are arranged by atomic number on the periodic table. Helium has an atomic number of 2, which is the lowest among the listed materials. Then comes cotton ball, rubber, and iron in that order.
"Wait" is third in alphabetical order among the words provided.
Yes, pencils need friction in order to write. The friction between the pencil lead and the surface of the paper allows the lead to leave a mark as it rubs off onto the paper. Without friction, the pencil lead would not be able to transfer onto the paper.
The pencil lead does not have a significant effect on the brightness of the bulb in a circuit because it does not conduct electricity efficiently. In order for the bulb to light up brightly, the circuit needs an efficient conductor such as a metal wire to allow the current to flow easily and light up the bulb.
A first order differential equation involves only the first derivative of the unknown function, while a second order differential equation involves the second derivative as well.
Pencil
pen--because alphabetical order depends on factors:-Alphabet letters, literally (spaces DO NOT make them differ)-If similar thus far, the shorter one comes first
The word scoreboard comes first in alphabetical order.
In alphabetical order, "Mac" comes before "Mc."
snow comes first
In comes before indict in alphabetical order.
"Girls" comes first in alphabetical order, followed by "girl's" and then "girls'".
Does this have to do with sports? Anyway, breothers comes first because it has an e, not an o first.
Africa
you
Cities comes before city's in alphabetical order.
The word do comes first in alphabetical order before doing.