Arrange the following events in order of oldest to most recent.
sherlock holmes and deductive reasoning
the french surete investigators
the autopsy of caesar
biometrics
a, b, c, d
b, a, c, d
c, b, a, d
d, a, b, c

answer: 4

explanation: 8

a. by using fur or clothes to trap heat energy near the body

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.