In the following take cv = 20.8 and cp = 29.1 j mol^-1 degree c^-1 for nitrogen gas: three moles of nitrogen at 30degree c, contained in a rigid vessel, is heated to 250 degree c. how much heat is required if the vessel has a negligible heal capacity? if the vessel weighs 100 kg and has a heat capacity of 0.5 kj kg^-1 degree c^-1, how much heal is required? four moles of nitrogen at 200degree c is contained in a piston/cylinder arrangement. how much heat must be extracted from this system, which is kept at constant pressure, to cool it to 40degree c if the heat capacity of the piston and cylinder is neglected?

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

answer is slate

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the doppler effect is used by weather forecasters to measure 

moving clouds