When force is exerted over a distance ,work is done by force. Forces can be classified as conservative or non conservative. The work done by a non conservative force depends on the path over which the force acts. Friction is an example of a non conservative force because the amount of work that must be done to overcome friction depends on the path taken .consider a person pushing a crate across a warehouse floor as shown in the diagram Describe how the normal force changes as the mass of the crate increases.

the answer is d. 74.02

the maximum mass of nh3 is nh3 in grams

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.