Why does middle c on an oboe sound different then a middle c played on a piano

 Flutes, oboes, bassoons, trombones, tubas, baritones reading bass clef and all string instruments are concert pitch instruments: when they play a C it sounds like a C on the piano. They don't have to transpose. (All instruments that mostly read bass clef are in C, but some - like bass guitar and string bass - are written an octave higher to keep the music in the staff).

Explanation: Pitch is off

Explanation:

Because an oboe has a low sound and an middle c is much higher note

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide