3 years ago

How does a wind turbine transform mechanical energy into electrical energy?

1 answer:

4 0

Answer:

"A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion. As wind moves past the blades of a wind turbine, it moves or rotates the blades. These blades turn a generator."

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Loggers cut down 2 identical trees. One tree was cut down with a hand saw and one was cut down with an electric saw. Which activ

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The hand saw involved more work and the electric saw involved more power.

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(a) Suppose that your measured weight at the equator is one-half your measured weight at the pole on a planet whose mass and dia

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Answer:

7160.2812 s or 1.988 hours

Explanation:

m = Mass of person

R = Radius of Earth = $6.37\times 10^{6}\ m$

g = Acceleration due to gravity = 9.81 m/s²

$\omega$ = Angular speed

Force at equator would be

$F_e=m(g-\omega^2R)$

Force at pole

$F_p=mg$

From the question

$F_e=\dfrac{1}{2}F_p\\\Rightarrow m(g-\omega^2R)=\dfrac{1}{2}F_p\\\Rightarrow \omega=\sqrt{\dfrac{g}{2R}}$

Time period is given by

$T=\dfrac{2\pi}{\omega}\\\Rightarrow T=2\pi\sqrt{\dfrac{2R}{g}}\\\Rightarrow T=2\pi\sqrt{\dfrac{2\times 6.37\times 10^6}{9.81}}\\\Rightarrow T=7160.2812\ s=1.988\ hours$

The rotational period of the planet is 7160.2812 s or 1.988 hours

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What type of machine would most likely be used to move buckets of the mineral pieces up to the surface of the Earth? a wedge a p

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The type of machine would be a pulley.

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How far back into the universe are we able to see? Explain.

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About 46 billion light years Because space expands so what we didn’t see before is what we could see now. An example could be how everyone thought Pluto was a regular sized planet but once you get a look at the bigger picture and compare it to other thing in space we now know Pluto is a dwarf planet.

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A squirrel runs at a speed of 9.9 m, with 25 J of kinetic energy. What is the squirrel’s mass?

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The mass of the squirrel is 0.51kg

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