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3 years ago

Which option describes the best material for the project described in the following scenario?

Engineering

2 answers:

il63 [147K]3 years ago

8 0

Answer: Its "D"

Explanation:

Did the same question on EDG 21 for Engineering and Design

padilas [110]3 years ago

7 0

Answer:

I think the answer is:

(4) Plastic is economic, easily cleanable, & moldable

Explanation:

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An insulated piston–cylinder device initially contains 1 m3 of air at 120 kPa and 17°C. Air is now heated for 15 min by a 200-W

irakobra [83]

Answer:

∆S1 = 0.5166kJ/K

∆S2 = 0.51826kJ/K

Explanation:

Check attachment for solution

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3 years ago

piston-cylinder assembly contains water vapor, initially at 10 bar and 360 degC. The water undergoes a process where pv=constant

DIA [1.3K]

Answer:

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Explanation:

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3 years ago

A large steel tower is to be supported by a series of steel wires; it is estimated that the load on each wire will be 19,000N. D

zhuklara [117]

Answer:

11.6 mm

Explanation:

With a factor of safety of 5 and a yield strength of 900 MPa the admissible stress is:

σadm = strength / fos

σadm = 900 / 5 = 180 MPa

The stress is the load divided by the section:

σ = P / A

σ = 4*P / (π*d^2)

Rearranging:

d^2 = 4*P / (π*σ)

$d = \sqrt{4*P / (\pi*\sigma)}$

$d = \sqrt{4*19000 / (\pi*180*10^6)} = 0.0116 m = 11.6 mm$

7 0

3 years ago

For a metal that has an electrical conductivity of 6.1 × 107 (Ω∙m)–1, what is the resistance of a wire that is 4.3 mm in diamete

kotegsom [21]

Answer: (C) 9.14 . 10⁻³ Ω

Explanation:

The resistance of a resistor, is proportional to his length and inversely proportional to his area, being the proportionality constant a property of the material, called resistivity.

The resistivity is defined as the inverse of the electrical conductivity, which depends on the number of charge carriers and the mobility of these carriers, which is different for each material.

So, we can calculate the resistance as follows:

R = 1/σ . L / A, where:

σ = electrical conductivity, l= length of the wire , A = wire cross-section (assumed circular).

Replacing by the values, we can calculate R as follows:

R = 1/6.1. 10⁷ (Ω.m) . 8.1 m. / π (0.0043)² m / 4 = 9.14 . 10⁻³ Ω

7 0

3 years ago

Design a logic circuit that has a 4-bit binary number as an input and one output. The output should be 1 iffthe input is a prime

Maurinko [17]

Answer:

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Explanation: