What is the mass of 1.0 l of water in grams?

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

What causes the development of most clouds and precipitation in the atmosphere?

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.