When hydrogen reacts with oxygen, hydrogen loses electrons. Which term applies to what happens to hydrogen in this reaction?
A. Oxidation
B. Synthesis
C. Reduction
D. Redox

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

Kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energy b. motion energy c. sound energy d. thermal energy

Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c