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4 years ago

Which STEM field involves design and development of processes to solve problems using concepts from the other disciplines?

Engineering

2 answers:

Fiesta28 [93]4 years ago

6 0

Answer:

Engieering

Explanation:

lesantik [10]4 years ago

3 0

Answer:

Engineering

Explanation:

STEM mainly incorporate knowledge from four disciplines which are:

Science
Technology
Engineering
Mathematics

The field of engineering combines concepts mainly from Science and Mathematics then with the help of technological developments using software, engineering field designs various structures and other elements that are essential to humanity.

Keywords: STEM, Science , Technology , Engineering , Mathematics

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What is one economic effect of environmental-protection laws?

Lorico [155]

Answer: Several examples point to positive effects on the economy.

Explanation:

In the first place, it is possible to point out that environmental protection protects human health. This saves billions of dollars that could be spent on health issues. On the other hand, people employed in the sector pay taxes like all other citizens. On the other hand, they directly affect the environment. Vast sums of money would also be spent on cleaning these areas, so this organization acts preventively and saves money for the government.

3 0

3 years ago

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Refrigerant 134a at p1 = 30 lbf/in2, T1 = 40oF enters a compressor operating at steady state with a mass flow rate of 200 lb/h a

Mazyrski [523]

Answer:

a) $\mathbf{Q_c = -3730.8684 \ Btu/hr}$

b) $\mathbf{\sigma _c = 4.3067 \ Btu/hr ^0R}$

Explanation:

From the properties of Super-heated Refrigerant 134a Vapor at $T_1 = 40^0 F$ , $P_1 = 30 \ lbf/in^2$ ; we obtain the following properties for specific enthalpy and specific entropy.

So; specific enthalpy $h_1 = 109.12 \ Btu/lb$

specific entropy $s_1 = 0.2315 \ Btu/lb.^0R$

Also; from the properties of saturated Refrigerant 134 a vapor (liquid - vapor). pressure table at $P_2 = 160 \ lbf/in^2$ ; we obtain the following properties:

$h_2 = 115.91 \ Btu/lb\\\\ s_2 = 0.2157 \ Btu/lb.^0R$

Given that the power input to the compressor is 2 hp;

Then converting to Btu/hr ;we known that since 1 hp = 2544.4342 Btu/hr

2 hp = 2 × 2544.4342 Btu/hr

2 hp = 5088.8684 Btu/hr

The steady state energy for a compressor can be expressed by the formula:

$0 = Q_c -W_c+m((h_1-h_e) + \dfrac{v_i^2-v_e^2}{2}+g(\bar \omega_i - \bar \omega_e)$

By neglecting kinetic and potential energy effects; we have:

$0 = Q_c -W_c+m(h_1-h_2) \\ \\ Q_c = -W_c+m(h_2-h_1)$

$Q_c = -5088.8684 \ Btu/hr +200 \ lb/hr( 115.91 -109.12) Btu/lb \\ \\$

$\mathbf{Q_c = -3730.8684 \ Btu/hr}$

b) To determine the entropy generation; we employ the formula:

$\dfrac{dS}{dt} =\dfrac{Qc}{T}+ m( s_1 -s_2) + \sigma _c$

In a steady state condition $\dfrac{dS}{dt} =0$

Hence;

$0=\dfrac{Qc}{T}+ m( s_1 -s_2) + \sigma _c$

$\sigma _c = m( s_1 -s_2) - \dfrac{Qc}{T}$

$\sigma _c = [200 \ lb/hr (0.2157 -0.2315) \ Btu/lb .^0R - \dfrac{(-3730.8684 \ Btu/hr)}{(40^0 + 459.67^0)^0R}]$

$\sigma _c = [(-3.16 ) \ Btu/hr .^0R + (7.4667 ) Btu/hr ^0R}]$

$\mathbf{\sigma _c = 4.3067 \ Btu/hr ^0R}$

5 0

3 years ago

Both portions of the rod ABC are made of an aluminum for whichE = 70 GPa. Knowing that the magnitude of P is 4 kN, determine(a)

san4es73 [151]

Explanation:

Δ $L_{BC}$ = Δ $L_{AB}$

$\frac{(Q - 4000)(0.5)}{3.14* 0.03 *0.03 *70*10^{9} }$ (1)

= $\frac{4000*0.4}{3.14*0.01*0.01*70*10^{9} }$

Q = 32,800 N

now put this value in equation 1.

Deflection of B = $\frac{(32800-4000)(0.5)}{3.14*0.03*0.03*70*10^{9} }$

= 0.0728 mm

4 0

4 years ago

A technician needs to check the heating operation of a heat pump that has no gauge access ports. The technician should start by:

OverLord2011 [107]

The technician should start by checking the temperature rise across the indoor coil.

<h3>Who is a technician?</h3>

This is a person who has skill in a particular area of job. A technician is responsible for repairs and also ensure different equipment and systems are working perfectly.

Hence, the technician should start by checking the temperature rise across the indoor coil.

Learn more about technician here : brainly.com/question/13315405

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2 years ago

Imagine the arc of a football as it flies through the air. How does this motion illustrate classical mechanics?

BigorU [14]

Answer: Maybe A

Explanation:

7 0

1 year ago

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