<span>The </span>second law of thermodynamics<span> states that the total </span>entropy<span> of an </span>isolated system<span> can never decrease over time. The total entropy can remain constant in ideal cases where the system is in a steady state (</span>equilibrium). For your natural system the correct ansver is <span>B.It will always increase</span>
The correct answer is 99.06 .
Since we know that,
1 ft = 12 inches, (1ft)3 = (12)3inches3
& 1 inch = 2.54 cm , (1 inch)3 = (2.54)3cm3
& 1 cm3 = 1ml,
&(1 ml)/1000 = 1L, so (1cm3)/1000 = 1L.
& 1 min. = 60 sec.
Now, 1ft3 = (12)3x(2.54)3/(1000) L
and 1 min = 60 sec
So, 1ft3/min = (12)^3x(2.54)^3/(1000)x(60) L/s
Hence 210 ft3/min = 210x(12^)3x(2.54)^3/(1000)x(60).
= 99.06.
Learn more about rate of the vacuum's air flow here :-
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Answer:
1.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.
Formula from physics to get the answer.
Explanation:
the answer is above with its si unit
