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(b)
The total power input to the leaf blower is 750 W.
The useful power output of the leaf blower is 360 W.
Calculate the efficiency of the leat blower.

Respuesta :

ackermannn1
% Eff = (Eout/Ein) x 100
% Eff = (360/750)x 100
% Eff = 48
The efficiency is 48%

The efficiency of the leaf blow is 48%.

How can we find the efficiency of the leaf blower?

  • E = m×c×Ф

         Here, E = Energy transferred

                   m = Mass

                   Ф = Temperature change

  • efficiency = (Useful energy out / Total energy in ) × 100
  • efficiency =  (Useful power out / Total power in ) × 100
  • E = P × t

            Here, E = Energy transferred

                      P = Power

                      t = time

  • v = f ×∧

        Here, v = speed

                   f = frequency

                  ∧ = wavelength

  • Substitute into the time equation,

       Efficiency =  (Useful power out / Total power in ) = 360/750 = 0.48

  • Convert it to percentage = 0.48 × 100 = 48%

So, the efficiency of the leaf blower is 48%.

To learn more about efficiency, refer to: https://brainly.com/question/21305967

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