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kozerog [31]
3 years ago
15

Para uma dada velocidade do vento, o gerador de turbina mostrado na figura produz 22 kW de potência elétrica. Como um sistema co

nversor de energia a turbina tem um rendimento de 30%. Determine (a) a energia cinética por unidade de tempo do ar que penetra a seção circular de 7,80 m de diâmetro e (b) a velocidade do vento.
Engineering
1 answer:
____ [38]3 years ago
4 0

Answer:

b

Explanation:

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What kind of situations breaks the causal link?
34kurt

Answer:A novus actus

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3 years ago
Consider a nuclear power plant that produces 1200 MW of power and has a conversion efficiency of 34 percent (that is, for each u
KIM [24]

Answer with Explanation:

The relation between power and energy is

Energy=Power\times Time

Since the nuclear reactor operates at 1200 MW throughout the year thus the energy produced in 1 year equals

E=1200\times 10^{6}\times 3600\times 24\times 365=3.784\times 10^{16}

Now from the energy mass equivalence we have

E=mass\times c^2

where

'c' is the speed of light in free space

Thus equating both the above values we get

3.784\times 10^{16}=mass\times (3\times 10^{8})^{2}\\\\\therefore mass=\frac{3.784\times 10^{16}}{9\times 10^{16}}=0.42kg

Since it is given that 1 kg of mass is 34% effective thus the mass reuired for the reactor is

mass_{req}=\frac{mass}{\eta }=\frac{0.43}{0.34}=1.235

Thus 1.235 kg of nuclear fuel is reuired for operation.

7 0
4 years ago
A trapezoidal section has a 5.0-ft bed width, 2.5-ft depth, and 1:1 side slope. Evaluate its geometric elements (Area, water dep
aleksley [76]

Answer:

a) 18.75 ft^2

b) 2.5 ft

c) 12.07 ft

d) 10 ft

e) 1.553 ft

f) 1.875 ft

Explanation:

Given data :

5.0-ft bed width, ( b )

2.5-ft depth ( y )

1 : 1 side slope

Evaluate

a) Area of trapezoidal section

A = by + my^2

we assume m = 1

A = [5 + (1 * 2.5 ) ] *2.5

   = ( 7.5 ) 2.5  = 18.75 ft^2

b) Calculate water depth

water depth = 2.5 ft

c) Calculate wetted perimeter

P = b + 2y √ 1 + m^2

  = 5 + (2.5*2) √ 1 + 1 ^2  =   12.07 ft

d) calculate top width

    T = b + 2my

       = 5 + 2 ( 1 * 2.5 ) = 10 ft

e) calculate hydraulic radius

R = A / P = 18.75 / 12.07

               = 1.553 ft

f) calculate hydraulic depth

 D = A / T = 18.75 / 10 = 1.875 ft

4 0
3 years ago
Antihistamines are used to treat_______.
gladu [14]

Answer:

<h2>Antihistamines are used to treat hay fever.</h2><h3>I hoped it helped</h3><h2>#Se xy EMPRESS</h2>
8 0
3 years ago
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You are the curator of a museum. The museum is running short of funds, so you decide to increase revenue. Should you increase or
blondinia [14]

Answer:

Explanation:

If the museum is running short of funds, and you decide to increase revenue. An increase or decrease in the price of admission into the museum depends on the following:

1. If demand for admission into the museum is elastic there are two possible outcomes

a. An increase in the price of admission leads to a decrease in the quantity demand of admission into the museum

b. A decrease in price of admission into the museum leads to an increase in the quantity demand of admission into the museum.

This follows the law of demand which states that "the higher the price, the lower the quantity demanded and the lower the price, the higher the quantity demanded".

2. If the demand for admission into the museum is inelastic, then an increase in price will lead to an increase in revenue of the museum.

Therefore, before the curator increase the price of admission into the museum, he should first determine the price elasticity of demand of the museum.

4 0
3 years ago
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