transfer energy

• What should you be able to describe by the end of the video?

  Energy transfer in domestic appliances
• What is meant by the power rating of an appliance?

  The rate at which energy is transferred
• What are the two main categories of energy transfer in appliances?

  • Electrical energy to kinetic energy
  • Electrical energy to thermal energy
• What type of energy do a blender and a fan primarily transfer?

  Kinetic energy from electrical energy
• What is the main purpose of a blender?

  To mix food
• Why do the iron and kettle transfer electrical energy into thermal energy?

  They are designed to get hot
• How does a hairdryer transfer energy?

  It moves air and heats it
• What appliances transfer electrical energy into both kinetic and thermal energy?

  • Hairdryer
  • Washing machine
• What does a washing machine do with electrical energy?

  Heats water and turns the drum
• What is an example of an appliance not designed to generate thermal or kinetic energy?

  Television
• What is the power rating of the fan?

  20 watts
• What is the power rating of the blender?

  400 watts
• What is the maximum power rating of the kettle?

  2200 watts
• What is the maximum power rating of the iron?

  2400 watts
• Why do appliances designed to generate thermal energy have higher power ratings?

  They require more energy to heat
• What does a power rating of 1 watt signify?

  One Joule of energy per second
• How much electrical energy does the fan transfer every second?

  20 Joules
• How much electrical energy does the blender transfer every second?

  400 Joules
• What is the relationship between power ratings and energy transfer in appliances?

  Higher power ratings indicate faster energy transfer
• How can you use power ratings to calculate total energy transfer?

  • Use the formula: Energy = Power × Time
  • Power is in watts, time in seconds