Well this is simple because you need to report the problem right away, how would be like talking to someone in a higher position that can do something about it or if you can do something and take action on your own accord.
A coffee cup calorimeter<span> is simply a styrofoam </span>cup<span> (or maybe one </span>cup<span> inside another) to provide insulation when materials are mixed inside of it. A styrofoam cover and a sensitive thermometer complete the apparatus.
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He forgot to bring home his equipment or he forgot to do his science experiment.
