P3–1B-009—02-03-2020

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

This lesson

• The chemistry (P2) test 
• Find the answers for the learning goals
• Check the learning goals

Goals

1. State the law of conservation of energy

2. What is always true about the total amount of energy generated compared to the amount of energy used?

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?

The plan for this lesson

Find the answers

1. State the law of conservation of energy

2. What is always true about the total amount of energy

 generated compared to the amount of energy used?

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 maywork together

• Use §2.5

• Done? start with the exercises of 2.5

Goals

1. State the law of conservation of energy

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

Goals

2. What is always true about the total amount of energy generated compared to the amount of energy used?

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

Goals

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 which is not purposefuly used

Goals

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

• Useful energy divided by total energy 

Goals

1. State the law of conservation of energy

2. What is always true about the total amount of energy generated compared to the amount of energy used?

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?

Link

Your thoughts 

on working mostly independent 

this lesson?

For next lesson

Homework: exercises §2.5

Next lesson

• Discussing the homework
  
• covering §2.10