During an earthquake, scientists at a seismic station observed that some waves were detected earlier than others. what is the likely cause of this observation? uniform pressure inside earth made the waves move at the same speed. uniform temperature inside earth made the waves move at different speeds. variation in density inside earth made the waves move at different speeds. variation in temperature inside earth made the waves move at the same speed.

C

Explanation:

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feral cats are estimated to eat tens of millions of native animals each night in australia

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.