Given a graph of velocity v. time, what does a horizontal line represent? The object’s acceleration is positive. The object is moving at constant velocity. The object’s acceleration is negative. The object is standing still.

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

What statement goes against the kinetic theory of gases