angelisabeast2447 angelisabeast2447

15-06-2021
Physics

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A kettle transfers 1,500 J of energy, 1,200 J to a thermal energy store in the water and 300 J to the air as sound. How efficient is the kettle?

Respuesta :

samuelonum1 samuelonum1

17-06-2021

Answer:

80%

Explanation:

Given data

The energy use is the 1200J transfered to the water

Total energy=1500J

Efficiency = Energy used/total enery

Efficiency= 1200/1500*100

Efficiency=0.8*100

Efficiency=80%

Hence the efficiency of the kettle is 80%

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