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3 years ago

Give two disadvantage of hydroelectric power

Physics

2 answers:

Andre45 [30]3 years ago

7 0

Environmental consequences

Limited Reservoirs

Effectus [21]3 years ago

3 0

Explanation:

damming of water which changes water flow, in turn could/does cause road/ property flooding

directly being related to water usage, if we have droughts(lack of rain) there we have less water to use for the power.

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Water is flowing in a pipe with a varying cross-sectional area, and at all points the water completely fills the pipe. At point

Salsk061 [2.6K]

Answer:

The fluids speed at a) $0.105\,m^{2}$ and b) $0.047\,m^{2}$ are $2.33\,\frac{m}{s^{2}}$ and $5.21\,\frac{m}{s^{2}}$ respectively

c) Th volume of water the pipe discharges is: $882\,m^{3}$

Explanation:

To solve a) and b) we should use flow continuity for ideal fluids:

$\Delta Q=0$ (1)

With Q the flux of water, but Q is $Av$ using this on (1) we have:

$A_{2}v_{2}-A_{1}v_{1}=0$ (2)

With A the cross sectional areas and v the velocities of the fluid.

a) Here, we use that point 2 has a cross-sectional area equal to $A_{2}=0.105\,m^{2}$ , so now we can solve (2) for $v_{2}$ :

$v_{2}=\frac{A_{1}v_{1}}{A_{2}}=\frac{(0.070)(3.5)}{0.105}\approx2.33\,\frac{m}{s^{2}}$

b) Here we use point 2 as $A_{2}=0.047\,m^{2}$ :

$v_{2}=\frac{A_{1}v_{1}}{A_{2}}=\frac{(0.070)(3.5)}{0.047}\approx5.21\,\frac{m}{s^{2}}$

c) Here we need to know that in this case the flow is the volume of water that passes a cross-sectional area per unit time, this is $Q=\frac{V}{t}$ , so we can write:

$A_{1}v_{1}=\frac{V}{t}$ , solving for V:

$V=A_{1}v_{1}t=(0.070m^{2})(3.5\frac{m}{s})(3600s)=882\,m^{3}$

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4 years ago

Can sombody help me out real quick?

Brut [27]

Answer:

I did this essay before, its not hard. Just read through it carefully and you'll figure it out. or just ask you mom, dad, guardian, or teacher for help

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3 years ago

The first law of thermodynamics invention that spurred its development is

Ket [755]

Energy and matter can neither be created or destroyed.

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3 years ago

A wave a strong undertow. What kind of wave is it

shutvik [7]

Hey there!

<span>Answer: </span>A swell

A wave which creates a strong undertow is called a swell. These types of waves are also known as <span>surface gravity waves.

Thank you!</span>

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3 years ago

A spring is compressed between two objects with unequal masses, m and M, ad held together. The objects are initially at rest on

AlekseyPX

Answer:

Explanation:

The complete question is here.

A spring is compressed between two objects with unequal masses, m and M, held together. The objects are initially at rest on a horizontal friction less surface. When released, which of the following is true?

a) Kinetic energy is same as before being released

b) The total final kinetic energy is zero.

c) The two objects have equal kinetic energy.

d) The speed of one object is equal to the speed of other.

e) The total final momentum of two objects is zero.

So option e) the total final momentum of two objects is zero.

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4 years ago

Give two disadvantage of hydroelectric power​

Give two disadvantage of hydroelectric power