At the indianapolis 500, you can measure the speed of cars just by listening to the difference in pitch of the engine noise between approaching and receding cars. suppose the sound of a certain car drops by a factor of 2.40 as it goes by on the straightaway. how fast is it going? (take the speed of sound to be 343 m/s.)

To develop this problem it is necessary to apply the concepts related to the Dopler effect.

The equation is defined by

Where

= Approaching velocities

= Receding velocities

c = Speed of sound

v = Emitter speed

And

Therefore using the values given we can find the velocity through,

Assuming the ratio above, we can use any f_h and f_i with the ratio 2.4 to 1

Therefore the cars goes to 145.3m/s

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true

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!