Discuss how nightingale used the three basic types of epidemiological investigation. the contagious diseases were primarily cholera and typhus; how are these diseases transmitted and prevented?

2%? i tried finding the exact sorry if it's not 100% correct ; -;

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.