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krok68 [10]
3 years ago
11

For an irreversible isothermal process occured in a system with temperature T, which following expression best evaluates the cha

nge of entropy of the isolated system? (A) ∆S=0 (B) ∆S<0 (C) ∆S>0 (D) ∆S=Q/T (E) ∆S>Q/T (F) ∆S
Engineering
1 answer:
Ulleksa [173]3 years ago
8 0

Answer:

∆S=Q/T

Explanation:

Given the general expression for entropy:

\Delta S = \int \frac{dQ}{T}

We can proceed to find the final expression.

As the temperature does not change, it can be removed from the integral, leaving:

\Delta S=\frac{1}{T} \int dQ

Now, we proceed to solve the integral to have the final answer:

\Delta S=\frac{1}{T} Q=\frac{Q}{T} \\\\Therfore\\\\\Delta S=\frac{Q}{T}

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What size resistor would produce a current flow of 5 Amps with a battery voltage of 12.6 volts​
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Answer:

resistance = 2.52 ohms

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The flexural strength or MOR of a ceramic is 310 MPa. A block of the ceramic, which is 20 mm wide, 15 mm high, and 300 mm long,
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Answer:

F=6200\ \text{N}\\

Explanation:

In this problem you need to define the force that acts upon a beam in a 3 point bending problem. I put a picture of the problem taken from Wikipedia:

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