Physics, 25.07.2019 09:30 umezinwachukwuebuka1

Awind 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?

Answers: 1

Show answers

Answers

Answer from: emurray

German physicist Albert Betz (in 1919) demonstrated that the highest efficiency you can achieve with a wind turbine is around 59%

We would have to analyze the design of an specific turbine to determine its efficiency, however it is unlikely to achieve 50% , as todays turbines have an average efficiency in the 20-35%

The answer would be around 25%

Answer from: whatnowb

Efficiency is ratio of output energy and input energy

$Efficiency = \frac{Electrical \: energy}{Wind\: Energy}$

Explanation:

Efficiency is defined as the output that we will get from a given machine for a given input of energy.

So here we know that input energy that we are getting from wind is in the form of electrical energy converted by the turbine and the input energy here is in the form of kinetic energy of wind or air molecules

so here this kinetic energy of wind will help to rotate the turbine due to which we will get the output electrical energy but in this whole process some of the wind energy is converted into heat due to frictional force between several components of turbine which shows our energy loss in this process

so efficiency is given by

$Efficiency = \frac{Electrical \: energy}{Wind\: Energy}$

Answer from: Quest

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

$p(t)=0.3t^2+6t+80$

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

$p(0)=0+0+80=80$

according to question, we have said that if the population has twice its initial population, then it becomes

$p(t)=2\times 80=160$

so, time taken to reach this above mentioned population is given by

$160=0.3t^2+6t+80\\\\160-80=0.3t^2+6t\\\\80=0.3t^2+6t\\\\0.3t^2+6t-80=0\\\\\text{using quadratic formula ,we get }\\\\t_{1,\: 2}=\frac{-60\pm \sqrt{60^2-4\cdot \: 3\cdot \: 800}}{2\cdot \: 3}\\\\t=-29.14\ and\ t=9.149$

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

Answer from: Quest

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

Other questions on the subject: Physics

Physics, 22.06.2019 03:10, jazprincezz7606

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Answers: 1

continue

Physics, 22.06.2019 11:50, kaylallangari2145

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

Answers: 2

continue

Physics, 22.06.2019 17:50, marianamartinez6

If there's a small amount of friction between two surfaces, the result could be select all that applya. no movement b. heatc. a little bit of movementd. sliding around

Answers: 2

continue

Physics, 22.06.2019 19:00, maddied2443

Matter that emits no light at any wavelength is called

Answers: 2

continue

You know the right answer?

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