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Nady [450]
3 years ago
14

Can we live without software?

Engineering
1 answer:
Kamila [148]3 years ago
8 0

No, because you are using it right now.

Yes, because software is not the most improtant thing in our life.

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Air is flowing steadily through a cooling section where it is cooled from 30 °C to 15 °C at a rate of 0.25 kg/s.
Lady bird [3.3K]

Answer:

C_{day} = 2.261\,USD

Explanation:

The heat transfer rate rejected to the refrigeration system is:

\dot Q_{L} = (0.25\,\frac{kg}{s} )\cdot (1.005\,\frac{kJ}{kg\cdot ^{\textdegree}C} )\cdot (30\,^{\textdegree}C-15\,^{\textdegree}C)

\dot Q_{L} = 3.768\,kW

The electric power needed to make refrigeration possible is:

\dot W = \frac{\dot Q_{L}}{COP_{R}}

\dot W = \frac{3.768\,kW}{2.8}

\dot W = 1.346\,kW

The daily energy consumption is:

\Delta E_{day} = (1.346\,kW)\cdot (86400\,s)

\Delta E_{day} = 116294.4\,kJ

\Delta E_{day} = 32.304\,kWh

The cost of electricity consumed by the air-conditioner per day is:

C_{day} = c\cdot \Delta E_{day}

C_{day} = (0.07\,\frac{USD}{kWh} )\cdot (32.304\,kWh)

C_{day} = 2.261\,USD

5 0
3 years ago
Read 2 more answers
You have a piece of 1045 steel 80 cm long and 30 cm wide and 15cm high. In this piece it is desired to make a groove along the 8
tino4ka555 [31]

Answer:

0.65 m/min

Explanation:

The volume of material to be removed is

80*8*10 = 650 cm^3

The tool has a diameter of 4 mm and a maximum axial cutting capacity of 50 mm, so its cross section normal to advance is

0.4*5 = 2 cm^2

If the groove have to be made in T = 5 minutes the advance speed would be

V/(S * T)

650/(2 * 5) = 65 cm/min = 0.65 m/min

4 0
3 years ago
What is the chord length of an airplane called?
aliya0001 [1]

Answer:

The distance from the leading edge to the trailing edge is called the chord, denoted by the symbol c. The ends of the wing are called the wing tips, and the distance from one wing tip to the other is called the span, given the symbol s

3 0
3 years ago
If f(
EastWind [94]
Can you retype this in for me so I can do it cause it’s lined up instead of horizontal
8 0
3 years ago
Draw the Pressure - Temperature Diagram showing the liquid and vapor phases, along with the saturation line and the critical poi
yarga [219]

Answer:

Pressure- temperature diagram of the fluid is the phase lines that separate all the phases.

Explanation:

Step1

Pressure temperature diagram is the diagram that represents the all the phases of the fluid by separating a line. There is no phase change region in the pressure temperature diagram out of 15 possible diagrams. There are three lines that separate the phase of the fluid. These three lines are fusion, vaporization and sublimation.

Step2

The intersecting point of these lines is triple point of fluid. Out of 15 possible phase diagram, only pressure temperature diagram has triple point as a point. In other diagrams phase change region is present and triple point is not a point. Critical point is the point in all possible property diagrams.

Pressure temperature diagram is shown below:

5 0
3 years ago
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