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svet-max [94.6K]

2 years ago

7

A wind generator, such as the one shown , uses the power of wind to generate electricity What do you think is happening inside t

he wind generator to convert the energy of the spinning blades into electricity? Make your best guess.

2 answers:

sesenic [268]2 years ago

8 0

Answer:

A wind turbine captures the wind, which then produces a renewable energy source. The wind makes the rotor spin; as the rotor spins, the movement of the blades drives a generator that creates energy. The motion of the blades turning is kinetic energy. It is this power that we convert into electricity.

lesya [120]2 years ago

4 0

Answer:

Explanation:

wires move through an electric field and create an electrical current

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You are designing a ski jump ramp for the next Winter Olympics. Youneed to calculate the vertical height^ h from the starting ga

Ede4ka [16]

Answer:

$H = 50.5 m$

Explanation:

As we know by work energy theorem that work done by all forces is equal to change in kinetic energy

So we know that

$W_f + W_g = \frac{1]{2}mv_f^2 - \frac{1}{2}mv_i^2$

so we know that

$W_f = -4000 J$

$v_f = 30 m/s$

$v_i = 2 m/s$

$m = 86 kg$

now we have

$mgH - 4000 = \frac{1}{2}(86)(30^2 - 2^2)$

$86(9.81)(H) - 4000 = 43(900 - 4)$

$H = 50.5 m$

4 0

2 years ago

A car has a kinetic energy of 4.32 x 10^5 J when traveling at a speed of 23 m/s.

Kisachek [45]

Answer:

I think the most interesting 3rd century 3g durga was 5f5

Explanation:

I 50degree and I have not done a good morning mam sushant since I am not pregnant and have no

4 0

2 years ago

A bicyclist was moving at a rate of 8 m/s, and then sped up to 10 m/s. If the cyclist has a mass of 120 kg, how much work was ne

sergeinik [125]

W=∆KE

KE=1/2m∆v^2

=1/2*120*(10-8) ^2

=240j

3 0

3 years ago

Read 2 more answers

A student wants to get real and inverted

sveta [45]

Answer:

concave mirror

Explanation:

5 0

2 years ago

A pendulum is made by letting a 4 kg mass swing at the end of a string that has a length of 1.5 meter. The maximum angle that th

olga nikolaevna [1]

Answer:

Approximately $7.8\; \rm J$ .

Explanation:

The change in the gravitational potential energy of the pendulum is directly related to the change in its height.

Refer to the sketch attached. The pendulum is initially at $\rm P_2$ . Its highest point is at $P_1$ . The length of segment $\rm BP_2$ gives the change in its height.

The lengths of $\rm AP_1$ and $\rm AP_2$ are simply the length of the string, $1.5\; \rm m$ . To find the length of $\rm BP_2$ , start by calculating the length of $\rm AB$ .

$\rm AB$ forms a leg in the right triangle $\rm \triangle AP_1B$ . Besides, it is adjacent to the $30^\circ$ angle $\rm P_1\hat{A}B$ . Its length would be:

$\rm AB = 1.5 \times \cos(30^\circ) \approx 1.30\; \rm m$ .

The length of $\rm BP_2$ would thus be

$\rm BP_2 = AP_2 - AB = 1.5 - 1.30 \approx 0.20\; \rm m$ .

The change in gravitational potential energy can be found with the equation

$\Delta \mathrm{GPE} = m \cdot g \cdot \Delta h$ . In this equation,

$m$ is the mass of the object,
$g \approx 9.81\; \rm N \cdot kg^{-1}$ near the surface of the earth, and
$\Delta h$ is the change in the object's height.

In this case, $m = 4\; \rm kg$ and $\Delta h \approx 0.20\; \rm m$ . Therefore:

$\Delta \mathrm{GPE} = 4 \times 9.81 \times 0.20 \approx 7.8\; \rm J$ .

6 0

2 years ago