23. According to the Nebula Hypothesis, the material in the solar nebula that was not absorbed into the Sun swirled around it into a(n)
made of dust and
gas and held in orbit by the Sun's gravity.
(1 point)
O stellar disk
nebular disk
O magnetic disk
o adFetion disk

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.

which

. the sierra madre fault zone of southern california

. the san andreas fault california