Quiz na Under the Stars tab, what is the best way to determine the Period of
the star or object being analyzed?
e
Scien
f
Select one:
O a. Use the graph scale to subtract the highest number of days
on the far side of the scale and the lowest number of days on the
near side.
Gettir
i
1
b. Flip a coin
O c. Activate Show Time Probes, slide the probes to two peaks and
subtract the left from the right probe.
Part 1
O d. Activate Show Mean Brightness and use the number shown.

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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.

sorry, is there a picture? i do not see any arrows.

wut? unius0123 wut?