Question

1. would two observers standing on opposite sides of the truck hear the same pitch at the same time? explain. type your answer here.

Explanation:

This is due to the Doppler effect. When the fire truck moves, the sound waves in front of the truck are compressed (shorter wavelength, higher frequency/pitch), while the waves behind are stretched (longer wavelength, lower frequency/pitch). Observers on opposite sides will be in regions of different wave compression/stretching.

Answer:

No, the two observers would not hear the same pitch. The observer in front of the moving truck will hear a higher pitch (compressed sound waves, shorter wavelength), while the observer behind will hear a lower pitch (stretched sound waves, longer wavelength) because of the Doppler effect.