18lapishso
18lapishso 18lapishso
  • 08-01-2021
  • Physics
contestada

All I need help on, is the first one on the top row. Thanks :))

All I need help on is the first one on the top row Thanks class=

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Quickanswerwhiz Quickanswerwhiz
  • 08-01-2021
13J is wasted energy.
The wasted energy is thermal energy (heat).
The light bulb’s efficiency is 67.5%
Answer Link
Fadhel
Fadhel Fadhel
  • 08-01-2021

Answer:

1a)40-27=13

1b) heat

1c)efficiency = W out/W in

so 27/40= 67%

Answer Link

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