A police officer points a laser gun from a moving police car at the back of a car that is passing at great speed. when the laser gun emits the first pulse, the car is 60 m in front of the police car. the speed of the police car is 80 km/h. A. calculate the time between sending the pulse and registering the reflected pulse. neglect the movement of the car relative to the police car during this time.
B. calculate the speed of the moving car in km/h.
Can you please help me. my teacher ignores me.

the device is called “ rocket engine”

nah.   i'm just sleepy.

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

statement #3 on andre"s list is false.