Why is mesopotamia considered an advanced civilization for the time period in history

Who was the better president between richard nixon and john adams in terms of accomplishments ?

Abasic premise of the national response framework is that: a. most incidents begin and end locally and are managed at the local or tribal level. b. response partners use nonstandard structures to allow for flexible and scalable responses. c. readiness to act encourages response partners to self-dispatch to an incident scene. d. incidents should be managed at the highest jurisdictional level possible.

An object weighs 40n in air , weighs 20n when submerged jn water and 30n submerged in a liquid of unknown density .what is the density of the liquid?