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4 years ago

Classify the terms as related to a thermal system or mechanical system.

Engineering

1 answer:

amid [387]4 years ago

6 0

The definition of the terms are given below:

Explanation:

Conduction

Conduction causes the heat to transfer from an object to another by the direct contact between them.

Motion

The action of moving of any object or substance is called motion.

Distance

The measurement of, how far two objects are located.

Temperature

It is the degree of hotness and coldness of body.

Absolute Zero

It is the lowest temperature possible where the particles have no motion. Absolute Zero is considered as 0 kelvin.

Speed

Rate of change of distance is called speed. It determines at what rate the object is changing its position.

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A motor vehicle engine operating with a diesel engine takes in atmospherics air at a temperature of 30°C and pressure of 1 bar.

nydimaria [60]

Answer:

η=0.568

Explanation:

At inlet condition

temperature = 30 C and pressure P=1 bar

The maximum temperature = 13456 C

Compression ratio r= 12

We know that for process 1-2

$\dfrac{T_2}{T_1}=r^{\gamma -1}$

$\dfrac{T_2}{303}=12^{1.4 -1}$

$T_2=818.68 K$

Now for process 2-3

$\dfrac{T_3}{T_2}=\dfrac{V_3}{V_2}$

$\dfrac{273+1345}{818.86}=\dfrac{V_3}{V_2}$

$\dfrac{V_3}{V_2}=1.97$

So the cut off ratio ρ=1.97

Efficiency of diesel engine

$\eta =1-\dfrac{\rho ^{\gamma}-1}{r^{\gamma -1}\gamma \left (\rho -1\right )}$

Now put the values

$\eta =1-\dfrac{1.97 ^{1.4}-1}{12^{1.4-1}\times 1.4\times \left (1.97 -1\right )}$

⇒η=0.568

So the efficiency is 56.8%.

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3 years ago

Que es la teología helenística

Artemon [7]

Answer: teología
Explanation:

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3 years ago

You are adjusting pH in the fed-batch bioreactor using a 1.5 Molar solution of Ca(OH)2 (Assume that in given conditions the base

mrs_skeptik [129]

Answer:

Final osmolarity = 866 mOsm

Explanation:

Starting cell culture medium = 320 mOsm

30 mL of 1600 mM NaOH into 1 L= (30 mL/1000) x 1600 = 48 mM

Osmolarity = osmoles / 1 L = (Mole x equivalent) / L = 48 x 2 = 96 mOsm

Feed solution = (300 mL / 1000 mL) 1500 mOsm = 450 mOsm

Total osmolarity = 320 + 96 + 450 = 866 mOsm

Hope this helps!

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3 years ago

The following two questions refer to the circuit below. Consider a non-ideal op amp where the output can saturate. The open loop

kotykmax [81]

Answer:

The most positive is value of Vs is 0.5mV

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3 years ago

When was the first black or white hole discovered?

ivolga24 [154]

Answer:

1964

Explanation:

It was discovered in 1964 when a pair of Geiger counters were carried on board a sub-orbital rocket launched from New Mexico.

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4 years ago