Match the events related to the formation of the universe with the stages during which they occurred.
-
-
the universe
became
transparent
gravity came
into existence.
the universe
was at its
densest.
-
,
o to 10-43
seconds
life
le
e
10-43 seconds
to 104 seconds
er
10-seconds
to 20 mins
20 mins to
380,000 years
the
.
full
11
f
380,000 years
mt
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An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)