P3–1B–010—03-02-2020

This lesson
  • Recap Conservation of energy
  • Checking the homework
  • Efficiency and sankey diagrams
  • Working independently
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Slide 1: Slide
Natuurkunde / ScheikundeMiddelbare schoolvwoLeerjaar 1

This lesson contains 16 slides, with text slides and 1 video.

Items in this lesson

This lesson
  • Recap Conservation of energy
  • Checking the homework
  • Efficiency and sankey diagrams
  • Working independently

Slide 1 - Slide

Goals
  • Answering the learning goals of previous lesson

  • To name the formula for effiency

  • Applying the formula for effiency

  • Reading a sankey diagram

Slide 2 - Slide

Recap conservation of energy
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?

Slide 3 - Slide

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?

Slide 4 - Slide

Checking the homework
Exercises §2.5

Slide 5 - Slide

Efficiency and
sankey diagrams

Slide 6 - Slide

Slide 7 - Video

What is the formula for efficiency?

Slide 8 - Slide

Slide 9 - Slide

Slide 10 - Slide

1) A construction worker puts 20 J of energy in to one strike of his hammer on the head of a nail. The energy transferred to driving the nail in to the wood is 8.0 J. What is the efficiency of the construction worker's hammering?
2) A particular chemical process has an energy efficiency of only 3.00%. To complete this large-scale chemical process, 140,000 J of energy is input. What is the energy output of this process?

Slide 11 - Slide

What did we cover this lesson?

Slide 12 - Slide

Slide 13 - Slide

Slide 14 - Slide

Checking the Goals
  • Answering the learning goals of previous lesson

  • To name the formula for effiency

  • Applying the formula for effiency

  • Reading a sankey diagram

Slide 15 - Slide

Next lesson
  • Homework: exercises §2.10
  • Have a great time on the england trip

Slide 16 - Slide