10. A police car with its siren sounding is stationary in heavy traffic. A pedestrian notices that, although the loudness of the sound produced does not change, the pitch varies,
Which line in the table describes the amplitude and the frequency of the sound?
amplitude
frequency
varying
constant
constant
constant
varying
constant
D
varying
varying

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

answerscientific theory;