On a quiet day while standing on a sidewalk you hear a friend holding a tuning fork produce a pure 440 Hz sound tone. When she sees you, she begins to ride her bike toward you. When she passes by you, she does not stop; instead, she continues biking away from you. Required:
Draw the plots that best represents qualitatively the frequency you hear of the wave emitted by the tuning fork?

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.