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An ambulance siren has frequency 250 Hz. The ambulance is headed towards an accident site with a speed of 90 km/h . Two police officers on separate motor cycles head for the same accident site: one follows the ambulance with a speed of 80 km/h and the other approaches the accident site from the other direction with a speed of 80 km/h. What frequency does ambulance siren has for each of the police officers? Take the speed of sound equal to 340 m/s.Topic: WBJEE
Gelatin which is a peptide is added in ice creams. What can be its role?Topic: WBJEE
The mass of a hydrogen atom is ............. kg.Topic: WBJEE
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