3. How do you define a research problem? Give three examples to illustrate your answer

If you want to change the pitch of a sound, you have to change the question 7 options: volume speed amplitude frequency

The first element on the periodic table of elements is carbon. a. true b. false

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