Answer:
reactants --> products + thermal energy
Explanation:
Heat is absorbed in endothermic reaction.
Answer:
If you apply a force to separate 2 opposite poles, the potential energy of the system increases.
<span>B. If the temperature of a solid is increased, the solid expands and its volume increases.</span>
<span>If you faced the situation when popcorn is heated over a flame and the kernel burst opened the thing which caused that is definitely : the air and water vapor which remain in the kernell have expanded.
Hope that helps.
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2.5 kg because you cant change the weight of the rock
