3.Listen to a conversation between an instructor and a student. Mark the following statements as true (T) or false (F).
1.The man confuses the types of currents.
2.The man forgets what AC stands for.
3.The man gives an example of AC.
4. Listen again and complete the conversation.
Instructor: Okay Ralph, let’s Revive one more time. What is an 1______ ?
Student: It’s when is an 2____________ flow Through something right?
Instructor: That’s right. Good job. Now what 3___________stand for?
Student: It stands for deep current. No wait it’s 4____________
Instructor: Yes, 5_________ direct current?
Student: That’s when the 6___________ switches direction every so often.
Writing
5. Use the course description and the conversation from Task 8 to fill out the student’s assignment.
ENGR220
08/20
Please describe two types of electric current. Give an example of each type.
Unit 2
Basic Physics
Section 2.1: Introduction
Mechanics is an important branch of physics. It is concerned with physical objects in motion. In this chapter, we will cover basic principles of mechanics, including Newton's Laws. We'll also cover the concepts of matter and energy.
This will bring us to the first division of mechanics, classical mechanics. This is one of the oldest branches of science, going back to the time of Aristotle. Classical mechanics is limited, however. It does not allow discussion of subatomic structures.
It also does not address the possibility of traveling near the physics speed of light.
Other branches of mechanics do address these topics. Certain properties behave differently on a microscopic scale, including gravity. Quantum mechanics seeks to understand the motion of these small particles. Relativistic mechanics uses the theory of relativity to study classical mechanics objects in motion. These are part of quantum field theory, which is covered in a later chapter.
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