If a liquid is heated, which of the following happens to both its energy content and the speed of its particles?
the energy increases; the speed increases.
the energy remains the same; speed remains the same.
the energy remains the same; the speed increases.
the energy increases; the speed decreases.

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy