Respuesta :

rafaleo84

Answer:

η = 58.3%

Explanation:

It has a total of 120 [J], and part of this energy is lost in Heat 50 [J], that is to say of those 120 [J] 120 - 50 = 70 [J] are used to prepare food.

Efficiency is characterized by being equal to the work done on the investment made.

Therefore the efficiency (η) is:

η = 70/120

η = 58.3%

Lanuel

When 120J is supplied to a toaster and 50J of energy is transferred into heat, the efficiency of the toaster is 42%.

Given the following data:

  • Energy input = 120 Joules
  • Energy output = 50 Joules

To find the efficiency of the toaster:

Mathematically, the efficiency of an engine is calculated by using the formula:

[tex]Efficiency = \frac{E_o}{E_i} \times 100[/tex]

Where:

  • Eo is the energy output.
  • Ei is the energy input.

Substituting the given parameters into the formula, we have;

[tex]Efficiency = \frac{50}{120} \times 100\\\\Efficiency = 0.42 \times 100[/tex]

Efficiency = 42%

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