The answer should be 1.6 kilometers.
They send out waves differently and cannot be heard easily
Answer:
f (frequency) = V / y where V is the speed of sound and y the wavelength
f = 1500 m/s / 1.5 m = 1000 / sec
T (period) = 1 / f = .001 sec
Suppose you replace the horn by a drum then the period would be the time between the beats of the drum - now if the source is moving towards the observer then the distance between crests of the wave produced by the drum will be shortened by V * T because of the motion of the drum "towards" the observer, and since the wavelength is shorter the frequency heard by the observer will be higher, and the higher the speed of of the car the shorter the wavelength as seen by the observer and the higher the frequency.
Also, if the car is moving away from the observer then the distance between the crests of the wave emitted will be further apart, and the observer will hear a lower frequency.
Answer:False
Explanation:
Turn the key to lock is not advisable as it lock the steering wheel and may create a dangerous situation.
Following steps can be taken in this situation
- Try to press the brake to stop the vehicle
- Shift gear to neutral in order to cease the acceleration of car.
- Try to lift the gas pedal in order to decrease the velocity of car.
