Question

(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.

Answer 1

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

Answer 2

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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