Circle/ highlight the letter of the characteristic used to classify a
mechanical wave.
a. the height of its crest
b. the depth of its trough
c. the way it travels through a medium
d. the type of medium through which it travels

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat

answer: a. same unit

explanation:

that would be because of both gravity and friction. so     c