What are the three main types of map projections? How do they differ?

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?

This is the substance(s) formed in a chemical reaction.

Most of the volume of an atom is occupied by the