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3 years ago

Which rigid motion maps the solid-line figure onto the dotted-line figure?

Engineering

1 answer:

Agata [3.3K]3 years ago

5 0

I would love to answer but unfortunately there is no picture.

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A 2 m3 insulated rigid tank contains 3 kg of nitrogen at 90 kPa. Now work is done on the system until the pressure in the tank r

Nutka1998 [239]

Answer: $\Delta S$ = 1.47kJ/K

Explanation: Entropy is the measure of a system's molecular disorder, i.e, the unuseful work a system does.

The nitrogen gas in the insulated tank can be described as an ideal gas, so it can be used the related formulas.

For the entropy, the ratio of initial and final temperatures is needed and as volume is constant, we use:

$\frac{P_{1}}{T_{1}} =\frac{P_{2}}{T_{2}}$

$\frac{P_{2}}{P_{1}} =\frac{T_{2}}{T_{1}}$

$\frac{T_{2}}{T_{1}} =\frac{175}{90}$

$\frac{T_{2}}{T_{1}} =1.94$

Specific Heat is the quantity of heat required to increase the temperature 1 degree of a unit mass of a substance. Specific heat of nitrogen at constant volume is $c_{v}=$ 0.743kJ/kg.K

The change in entropy is calculated by

$\Delta S= m[c_{v}ln(\frac{T_{2}}{T_{1}})-Rln(\frac{V_{2}}{V_{1}} )]$

For the nitrogen insulated in a rigid tank:

$\Delta S= m[c_{v}ln(\frac{T_{2}}{T_{1}})]$

Substituing:

$\Delta S= 3[0.743ln(1.94)]$

$\Delta S=$ 1.47

The entropy change of nitrogen in an insulated rigid tank is 1.47kJ/K

6 0

3 years ago

Consider a thin-walled cylindrical tube having a radius of 65 mm that is to be used to transport pressurized gas. (a) (10 points

AlladinOne [14]

Answer:

The minimum required thickness for a steel pressure vessel (t) is 2.275 mm

Explanation:

Minimum required thickness is the thickness of a material without corrosion allowance for each component based on the appropriate design that consider pressure, mechanical and structural loading.

Given that:

radius (r) = 65 mm = 65 × 10⁻³ m

Factor of safety (N) = 3.5

Inside presssure ( $P_{in}$ ) = 11 MPa

Outside pressure ( $P_{out}$ ) = 1 MPa

Yield strength ( $\sigma_y$ ) = 1000 MPa

Therefore:

$\sigma_y =\frac{\sigma_y}{N}$ , Substituting values,

$\sigma_y =\frac{\sigma_y}{N}=\frac{1000}{3.5}=285.714 MPa$

The minimum required thickness for a steel pressure vessel (t) is given by the equation:

$t=\frac{r.(P_{in}-P_{out})}{\sigma_y}$ . Substituting values

$t=\frac{r.(P_{in}-P_{out})}{\sigma_y}=\frac{65*10^{-3} *(11-1)10^{6} }{285.714*10^{6} } =2.275*10^{-3} =2.275 mm$

The minimum required thickness for a steel pressure vessel (t) is 2.275 mm

7 0

3 years ago

The host at the end of the video claims that ___________ is crucial to his success as a driver. A. Reaction time B. A safe space

Snezhnost [94]

Answer:

answer is C. his seat belt

5 0

3 years ago

Student A says hazardous waste can take the form of solid, liquid, or gas. Student B says hazardous waste can only take the form

lina2011 [118]

Answer:

Student A

Explanation:

hope this helps have a great day

4 0

3 years ago

What is the name of the part that supports the headlight assembly?

Shkiper50 [21]

A headlight assembly is made up of many parts that work together smoothly. One of these components is the headlight bracket. Sometimes known as “headlight mounting bracket,” it keeps the headlamp affixed to the header. The headlight bracket is made from sturdy material like plastic or steel.

8 0

3 years ago