Atruck was carrying a substance in a tank. the molecules of that substance were moving away from each other. the truck parked overnight in a place where energy transferred out of the substance. in the morning, the substance was a gas. how were the molecules moving in the morning? explain why the molecules were moving that way after energy was transferred out of them.

The molecules will move closer to each other. They will contract.

Explanation:

When there is energy in the particles, they will move move apart from each other. The will be far apart from each other and mostly the state of the matter will expand. It will be from solid to liquid to gas.

But when the energy is removed from the substance, the particles will move closer to each other. They will contract. The state of matter will contract from gas to liquid to gas.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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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.