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pishuonlain [190]
3 years ago
6

Which is a disadvantage of using wind as an energy source? Check all that apply.

Physics
2 answers:
Anvisha [2.4K]3 years ago
8 0

Answer: It may be unreliable.    

Explanation:

Harnessing wind a s a source of energy is very efficient and renewable. It does not produce any waste and is environment friendly energy resource because it is naturally occurring.

But it is unreliable. The wind is the motion of air from high pressure region to low pressure region. Thus, we cannot start or stop wind turbines to spin. It depends on the wind and its speed.

kramer3 years ago
7 0

Answer:

A) it may be unreliable

Explanation:

Sorry years late but maybe for people that need it now

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You stand on a merry-go-round which is spinning at f = 0:25 revolutions per second. You are R = 200 cm from the center. (a) Find
ivanzaharov [21]

Answer:

(a) ω = 1.57 rad/s

(b) ac = 4.92 m/s²

(c) μs = 0.5

Explanation:

(a)

The angular speed of the merry go-round can be found as follows:

ω = 2πf

where,

ω = angular speed = ?

f = frequency = 0.25 rev/s

Therefore,

ω = (2π)(0.25 rev/s)

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(b)

The centripetal acceleration can be found as:

ac = v²/R

but,

v = Rω

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ac = (Rω)²/R

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therefore,

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<u>ac = 4.92 m/s² </u>

(c)

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m*ac = μs*R = μs*W

m*ac = μs*mg

ac = μs*g

μs = ac/g

μs = (4.92 m/s²)/(9.8 m/s²)

<u>μs = 0.5</u>

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When do two different position-time graphs have<br> matching velocity-time graphs?
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A force of 3,200 kg x m/s^2 (Newton’s) acts on a truck giving it an acceleration of 2 m/s^2. What is the mass of the truck ?
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A plane glass slab is kept over various colored letters, the letter which appears least raised is
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