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3 years ago

Which of the following is a correct version of a user story?

Engineering

1 answer:

alexandr402 [8]3 years ago

6 0

Answer:

As a first-time user, I want to print my account balance and monthly statement.

As a first-time user, I want to review my account balance information.

As a first-time user, I want to access my account and monthly statement.

As a first-time user, I want to access my account to check the balance.

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Using the tables for water determine the specified property data at the indicated state. For H2O at T = 140 °C and v = 0.2 m3/kg

Dennis_Churaev [7]

Answer:

$h = 1429.74\,\frac{kJ}{kg}$

Explanation:

The determination of any further properties requires the knowledge of two independent properties. (Temperature and specific volume in this case). The specific volumes for saturated liquid and vapor at 140 °C are, respectively:

$\nu_{f} = 0.001080\,\frac{m^{3}}{kg}$

$\nu_{g} = 0.50850\,\frac{m^{3}}{kg}$

Since $\nu_{f} < \nu < \nu_{g}$ , it is a liquid-vapor mixture. The quality of the mixture is:

$x = \frac{\nu-\nu_{f}}{\nu_{g}-\nu_{f}}$

$x = \frac{0.2\,\frac{m^{3}}{kg} - 0.001080\,\frac{m^{3}}{kg} }{0.50850\,\frac{m^{3}}{kg} - 0.001080\,\frac{m^{3}}{kg} }$

$x = 0.392$

The specific enthalpies for saturated liquid and vapor at 140 °C are, respectively:

$h_{f} = 589.16\,\frac{kJ}{kg}$

$h_{g} = 2733.5\,\frac{kJ}{kg}$

The specific enthalpy is:

$h = h_{f}+x\cdot (h_{g}-h_{f})$

$h = 589.16\,\frac{kJ}{kg}+0.392\cdot \left( 2733.5\,\frac{kJ}{kg} - 589.16\,\frac{kJ}{kg} \right)$

$h = 1429.74\,\frac{kJ}{kg}$

6 0

4 years ago

Read 2 more answers

Statement 1: All balls hit the ground at the same time. Statement 2: All balls hit the ground with the same force. Statement 3:

laiz [17]

Answer:

Statement 1: All balls hit the ground at the same time

Explanation:

When there is no resistance of air, the acceleration due to gravity experienced by all the bodies are same. So for falling bodies, neglecting the air resistance, the falling object will be weightless and therefore all the objects will hit the ground at the same time when there is nor air resistance and the objects are considered to be falling in vacuum.

7 0

3 years ago

Giving free brainlist first 1

kaheart [24]

Hi! Hope you're having a great day!

8 0

3 years ago

How to calculate effective resistance

denis23 [38]

Answer:

For a circuit with resistances R1 and R2 in series or in parallel as in Figure 2, the effective resistance can be calculated by using the following rules. Rab = R1 + R2.

Explanation:

4 0

3 years ago

For a bolted assembly with eight bolts, the stiffness of each bolt is kb = 1.0 MN/mm and the stiffness of the members is km = 2.

rjkz [21]

Answer:

a) 0.978

b) 0.9191

c) 1.056

d) 0.849

Explanation:

Given data :