Which event is an example of a contact force?
A.
a nail being attracted to a magnet
B.
an electric charge jumping from a sweater to a person
C.
a leaf falling from a tree
D.
a person pulling a sled

D. A person pulling a sled

Explanation:

A contact force is any force that requires contact/touch to occur, such as kicking, pulling, or pushing something.

no starving yourself won't it will make you lose more weight what you need to do is find out what foods make you gain weight like bread and meats with fat on

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.