An important news announcement is transmitted by radio waves to people sitting next to their radios 73 km from the station and by sound waves to people sitting across the newsroom 2.90 m from the newscaster. Taking the speed of sound in air to be 343 m/s, who receives the news first?

An ambhulance blowing a siren of frequency 700Hz is travelling slowly towards vertical reflectoing wall with a speed 2m/s. The speed of sound is 350m/s. How many beats ar heard per sec to the driver of het ambluance?

As a train starts from rest and then accelerates down the track, coming toward me faster and faster, the speed of the sound waves coming toward me will be:Select one:a.some constant speed faster than the normal speed of sound in air.b.equal to the normal speed of sound in air.c.faster and faster.d.slower than the normal speed of sound in air.

Which of the following is the fastest way for a signal to be transmitted?

You can hear an echo when the sound wave reflects from the wall and reaches you.If you hear an echo, 2 seconds after you produce the sound, how far is the wall?Use a speed of sound of 340 m/s for this question.    Group of answer choices1360 meters away from you340 meters away from you170 meters away from you680 meters away from you

A source moves towards a stationary observer with a speed of 20m/s. If the frequency of the source is 100Hz and speed of sound is 330m/s, determine the apparent frequency heard by observer(ii) Determine the wavelength of sound heard by the observer in part a.108.5Hz;  3.55mb.108.5Hz; 2:10 mc.104.5Hz; 3.10 md.96.45Hz; 3.55me.106.45Hz; 3.10mf.104.5Hz; 3.67 m