A police car siren emits a frequency of 2010 Hz when stationary. Another car
hears a 1920 Hz sound when it drives
away from the stationary police car,
How fast is the second car driving?
(Speed of sound = 343 m/s)
(Unit = m/s)

The low lands i believe

Sorry i don’t know what to do

Answer: 1.4 seconds which is the third optionexplanation: current is defined as the flow of charge per timetherefore, the equation that relates current, charge and time can be expressed as follows: i = δq / δtwhere: i is the current given = 1.8 ampereδq is the charge given = 2.5 coulombδt is the time required for the flow of the given charges to give the 1.8 ampere.substitute with the givens in the above equation to get the time as follows: 1.8 = 2.5 / δtδt = 2.5 / 1.8 = 1.38888 which is approximately 1.4 secondshope this was !