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3 years ago

6

Why do all the electrons in an iron atom not settle together into the lowest energy state? because.?

1 answer:

LiRa [457]3 years ago

3 0

Electrons in an iron atom (or in any atom) cannot settle all together into the lowest energy state because of Pauli exclusion principle: this principle states that two or more identical fermions (and so, electrons included) cannot occupy the same quantum state of a system at the same time.

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In a hydroelectric power plant, water flows from an elevation of 400 ft to a turbine, where electric power is generated. For an

VashaNatasha [74]

Answer:

$V=3.475ft^3/s=3.48ft^3/s$

Explanation:

We have here values from SI and English Units. I will convert the units to English Units.

We hace for the power P,

$P= 100kW \rightarrow 100kW*(\frac{737.56ft.lbf/s}{1kW})$

$P= 73.7*10^{3}ft.lbf/s$

we have other values such $h=400ft$ and $\gamma= 62.42lb/ft^3$ (specific weight of the water), and 0.85 for \eta

We need to figure the flow rate of the water (V) out, that is,

$V=\frac{P}{\gamma h \eta_0}$

Where $\eta_0$ is the turbine efficiency, at which is,

$\eta_0 = \frac{P}{\gamma Vh}$

Replacing,

$V=\frac{73.7*10^{3}}{62.42*400*0.85}$

$V=3.475ft^3/s$

With this value (the target of this question) we can also calculate the mass flow rate of the waters,

through the density and the flow rate,

$m=\rho V\\m= 3.475*1.94 \\m=6.7415 slugs/s$

converting the slugs to lbm, 1slug = 32.174lbm, we have that the mass flow rate of the water is,

$m= 217lbm/s$

6 0

2 years ago

What is the acceleration if we speed up from 10m/s to 30 m/s in 10 seconds

lina2011 [118]

Acceleration= change in speed/ change in time

30-10= 20 (change in speed)
Time= 10 seconds

20/10= 2
Acceleration= 2 m/s^2

Hope this helps! :)

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3 years ago

Could someone please help me with this question?

Elenna [48]

1 because the the mid night summer is dark

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3 years ago

What is weight?

OverLord2011 [107]

Answer:

C

Explanation:

The answer is C) the mass of an object

8 0

2 years ago

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A liquid of density 1136 kg/m3 flows with speed 1.06 m/s into a pipe of diameter 0.26 m . The diameter of the pipe decreases to

sesenic [268]

Answer:

Explanation:

How

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3 years ago