The light from florescent-lights, when analyzed in a spectrometer, exhibit the same lines in the yellow, green, and blue spectral regions. This is evidence that A) fluorescent lights contains fluorine gas

B) Air is present in all fluorescent lights

C) there are no gases present in fluorescent lights

D) The same element is present in all fluorescent lights

E) different elements are present in each fluorescent light

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

a skateboard rolling across the street - apex

i need with 1.3.2 investigate cycling o2 and co2 apex

we need to see it

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y