contestada

Sarah hears the siren of an ambulance that is moving toward her. If the actual frequency of the siren is 2000 hertz; which frequency
washeard by Sarah?
OA. 1900
B. 2000
C. 1000
D. 2100

Sarah hears the siren of an ambulance that is moving toward her If the actual frequency of the siren is 2000 hertz which frequency washeard by Sarah OA 1900 B 2 class=