a wind turbine takes in energy from wind with the goal of converting it into electrical energy. much of the…

a wind turbine takes in energy from wind with the goal of converting it into electrical energy. much of the wind energy is also converted into the kinetic energy of the spinning turbine and heat lost to the air around it. if the goal of the turbine is to put out electric energy, what is the efficiency of the turbine? kinetic energy of wind 3000 j electric energy 750 j kinetic energy of turbine? j heat 750 j 25% 50% 75% 100%

a wind turbine takes in energy from wind with the goal of converting it into electrical energy. much of the wind energy is also converted into the kinetic energy of the spinning turbine and heat lost to the air around it. if the goal of the turbine is to put out electric energy, what is the efficiency of the turbine? kinetic energy of wind 3000 j electric energy 750 j kinetic energy of turbine? j heat 750 j 25% 50% 75% 100%

Answer

Explanation:

Step1: Recall efficiency formula

Efficiency $\eta=\frac{\text{useful output energy}}{\text{input energy}}\times100%$

Step2: Identify input and useful - output energy

The input energy is the kinetic energy of the wind, $E_{in}=3000\ J$. The useful - output energy is the electric energy, $E_{out}=750\ J$.

Step3: Calculate efficiency

$\eta=\frac{750}{3000}\times 100% = 25%$

Answer:

25%