Decode the cause of pain triggered by deep breathing. Explore the spectrum of origins, from mechanical chest wall issues to critical pulmonary conditions.
Define 'fowl' precisely by exploring its biological classification, evolutionary groups, and its distinct relationship to 'poultry' and the general term 'bird.'
Explore the definitive solid state of copper hydroxide ($\text{Cu}(\text{OH})_2$), detailing its ionic chemistry, physical characteristics, and practical applications.