3 years ago

What is the correct order of the different environments from coldest to hottest?

Engineering

2 answers:

CaHeK987 [17]3 years ago

7 0

The answer is the third statement- Tundra, wetland, rainforest, desert

Iteru [2.4K]3 years ago

6 0

Number 3 is right.......

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Steam enters a nozzle at 400°C and 800 kPa with a velocity of 10 m/s, and leaves at 300°C and 200 kPa while losing heat at a rat

jeyben [28]

Answer:606 m/s

Explanation:

Given

Steam Inlet temperature $400^{\circ} C$ and pressure 800 KPa

$h_1=3267.7 kJ/kg$

initial Velocity 10 m/s

Steam Outlet Velocity is $300^{\circ} C$ and pressure is 200 KPa

$h_2=3072.1 kJ/kg$

$\nu _2=1.31632$

From steam table

Heat loss 25 KW

inlet area 800 cm^2

applying Steady Flow Energy Equation

$h_1+\frac{1}{2}v_1^2++Q=h_2+\frac{1}{2} v_2^2+W$

$3267.7+\frac{1}{2000}10^2-25=3072.1+\frac{1}{2000}v_2^2$

$3267.7-3072.1+0.05-25=\frac{1}{2}v_2^2$

$v_2=\sqrt{195.65\times 2}=606 m/s$

and volume flow rate is $m=\dot{m}\mu _2=2.082\times 1.31623=2.74 m^3/s$

5 0

3 years ago

Read 2 more answers

Drag the tiles to the correct boxes to complete the pairs.

Jobisdone [24]

Answer:

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3 0

3 years ago

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kow [346]

Answer:

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3 years ago

Steel balls 10 mm in diameter are annealed by heating to 1150 k and then slowly cooling to 450 k in an air environment for which

Darina [25.2K]

Answer:

The answer is below

Explanation:

Given that:

ρ = 800 kg/m3, c = 600 J/kg-K, k = 40 W/m-K, Initial temperature = Ti = 1150,

Environment temperature = T = 450 K, Final temperature = T∞ = 325 K

Diameter = 10 mm = 0.01 m, A = 6

The estimated time for cooling process (t) is given as:

$t=\frac{\rho dc}{hA} ln\frac{T_i-T_\infty}{T-T_infty}=\frac{7800*0.01*600}{25*6} ln\frac{1150-325}{450-325}\\ \\t=589\ s\\t=0.1635\ h$

The estimated cooling time is 589 s

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3 years ago

Stirrups are used in a concrete beam:_______

VMariaS [17]

The answer is E to increase the shear strength of the beam beyond that provided by the concrete

5 0

3 years ago