In a nuclear reaction, mass must be lost to produce energy. true or false

A(n) is an alliance or collection of parties.

What does it mean to say that "service sector" jobs are predominant in europe's mixed economies today? a. that jobs where people work in factories predominate b. that jobs where people do something for others predominate c. that jobs where people work the land predominate d. that jobs in government predominate

Describe at least three effects of the drug war in mexico.