P3–1G–009—03-02-2020

• Natuurkunde / Scheikunde
• Middelbare school
• havo
• Leerjaar 1

This lesson

• A video
• Find the answers
• Discuss the learning goals
• A questionaire

Goals

1. State the law of conservation of energy

2. What is true about the amount of energy that goes into a process and that comes out of a process?

3. What does it mean to say that energy is useful? 

What does it mean to say that energy is wasted?

4. What two factors in an energy transfer are compared together to detimerine the efficiency? And how?

Video

Find the answers

1. State the law of conservation of energy

2. What is alway true about the total amount of 

energy in the beginning of a process and the 

total amount of energy at the end of a process?

3. What does it mean to say that energy is useful? 

What does it mean to say that energy is wasted?

4. What two factors in an energy transfer are compared 

to detimerine the efficiency? And how?

• You may work together

• Use §2.5

• Done? start with the exercises of 2.5

Find the answer

1. State the law of conservation of energy

• Energy cannot be created or destroyed. It can be transferred.

Find the answers

2. What is alway true about the total amount of energy in the beginning of a process and the total amount of energy at the end of a process?

• The total amount of energy generated in a process is always the same as what is required for it.

Find the answers

3. What does it mean to say that energy is useful? 

What does it mean to say that energy is wasted?

• Useful energy: The energy generated in an energy transfer which is purposufuly used

• Wasted energy: The energy generated in an energy transfer which is not purposefuly used

Find the answers

4. What two factors in an energy transfer are compared together to detimerine the efficiency? And how?

• The usefull energy
• The total energy

Find the answers

4. What two factors in an energy transfer are compared together to detimerine the efficiency? And how?

• The usefull energy
• The total energy

Goals

1. State the law of conservation of energy

2. What is alway true about the total amount of energy in the beginning of a process and the total amount of energy at the end of a process?

3. What does it mean to say that energy is useful? 

What does it mean to say that energy is wasted?

4. What two factors in an energy transfer are compared together to detimerine the efficiency? And how?

This lesson

• A video
• Find the answers
• Discuss the learning goals
• A questionaire

 questionaire

For next lesson

• Homework: exercises § 2.5

• We will start §2.10