do you believe that most of the things around us formed similarly with the way stars and supernova were born

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

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.

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.