Which system contains divisions such as peripheral, central and autonomic? digestive nervous endocrine reproductive other:

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

What is usually (but not always) related to the metabolic processes of living organisms in its organic form?