How does a vector quantity differ from a scalar? check all that apply. a. vectors have direction. b. vectors have units. c. vectors are bigger. d. vectors are faster.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.