can you please help me with this assignment, please show all the work.

This is Physics 20 (grade 11)- MOD 8- LESSON 6- The Doppler Effect

Question 8 A sound-emitting object is moving towards an observer. What will happen to Not yet answered the perceived wavelength as the speed of the source increases? Marked out of 2.00 Flag question As the speed of the sound emitting object APPROACHES THE SPEED OF SOUND, the perceived wavelength will approach: meters (remember, the source is moving towards the observer. Type your numerical answer in the blank)A sound-emitting object is moving towards an observer. What will happen to the perceived wavelength as the speed of the source increases? The wavelength does not change. The wavelength decreases. The wavelength increases. tting object APPROACHES THE SPEED OF SOUND, theQuestion 9 A fire engine is driving AWAY from you at a speed of 15.3 m/s. One of the notes in its siren Not yet answered has a fundamental frequency of 240 Hz. Marked out of The speed of sound is 338 m/s. What will you perceive to be the fundamental frequency of 1.00 that particular note? Flag question Calculate the perceived frequency of the note, rounded to the nearest Hz. Answer: Question 10 A car is approaching you at a speed of 56.0 km/h. The car horn SOUNDS LIKE it has a Not yet answered frequency of 262 Hz. Marked out of The speed of sound is 335 m/s. Calculate the true fundamental frequency of the horn, 1.00 rounded to the nearest Hz. Flag question Answer:Question 11 A car approaches you at 88.0 km/h and sounds its horn. The perceived frequency of the Not yet answered horn is 277 Hz and the true fundamental frequency of the horn is 241 Hz. Marked out of Calculate the speed of sound, rounded to the nearest Meter Per Second. 2.00 Flag