Question

A kettle consumes 198 kJ to boil water. If 168 kJ was used to boil the

Answer 1

The efficiency of the kettle is 117.9%

What is efficiency?

Efficiency is used to measuring how much work or energy we can conserve in a process. In other words, it is like comparing the output of the energy to the input of the energy in any given system.

It is also define as the ratio of  Energy Input to the Energy Output. To express it in percent multiply it by 100.

Here, Efficiency = Energy output / Energy input

          $η =\frac{W_{out} }{W_{in} } * 100$

$η = \frac{198kJ}{168kJ} * 100$  

=  117.9%

So , the efficiency is 117.9%

For more Efficiency related question visit:

brainly.com/question/13110830

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