In 1999 confusion between the use of the english and metric systems resulted in the loss of the mars climate orbiter, which was intended to study that planet’s water history. how could costly mistakes like this be avoided in the future?

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.

the tricuspid valve is present between right atrium and right ventricle