Physics, 14.04.2021 17:10 samariamartinez1029

1. How are hot and cold packs constructed so that the reaction takes place only when needed? 2. Hypothesize two ways that you could change the amount of heat given off or absorbed in these packs.

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1. How are hot and cold packs constructed so that the reaction takes place only when needed? 2. Hypothesize two ways that you could change the amount of heat given off or absorbed in these packs.​

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Another question on Physics

1. How are hot and cold packs constructed so that the reaction takes place only when needed? 2. Hypothesize two ways that you could change the amount of heat given off or absorbed in these packs.