Apiston–cylinder device contains 0.15 kg of air initially at 2 mpa and 350°c. the air is first expanded isothermally to 500 kpa, then compressed polytropically with a polytropic exponent of 1.2 to the initial pressure, and finally compressed at the constant pressure to the initial state. determine the boundary work for each process and the net work of the cycle.

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

(75°f − 32) × 5/9 = 23.889°c

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explanation:

wind is defined by the direction it blows from.   for example, a wind blowing from north to south is called a northerly wind.

this could be newton#'s law of cooling. the cooling curve is exponential