The parade included fire trucks and police cars, is an example of -

A Car is travelling at (v)/(10) ms^(-1) and sounds horn of frequency 990 Hz. The apparent frequency heard by a police chasing the car at v/9 ms^(-1) , where V is velocity of sound

A person is riding a motorcycle at a speed v towards a stationary car operating its siren at 165Hz. A police car is chasing the person at a speed 22 m/s with its siren operating at 176 Hz. If the motorcyclist does not heard beats, the speed v (m/s) is (speed of sound in air = 330 m/s)

A car moving on a straight road is an example of:

Three compound X, Y and Z were taken into three different laboratory vessels annd they are carried out by a chemist in his car. The car caught fire due to short circuit and the chemist came out of the car and noticed following observations: Q. Compound Y produced two oxides, among these oe oxide turns anhydrous CuSO_(4) into blue and other gas slows down fire in the car, then Y is

Three compound X, Y and Z were taken into three different laboratory vessels annd they are carried out by a chemist in his car. The car caught fire due to short circuit and the chemist came out of the car and noticed following observations: Q. Which of the following compound does not react with cold and dil. HNO_(3) ?

Three compound X, Y and Z were taken into three different laboratory vessels annd they are carried out by a chemist in his car. The car caught fire due to short circuit and the chemist came out of the car and noticed following observations: Q. Compound X changes into white substnace along with liberation of neutral oxide and then white substnace decomposed into three products among which two are acidic oxides. among these oxides non-polar oxide can undergo polar cyclic polymer on cooling. the compound X will be:

A police inspector is chasing a thief who is running away in a car with a speed 3m/s. The speed of police jeep is 12 m/s. Then the speed of image of police jeep as seen by thief in the rear view mirror when the police jeep is at a distance of 30 m is (value of focal length of the rear view mirror is 15 m)

While travelling back to his residence in the car, Dr. Pathak was caught up in a thunderstorm. It became very dark. He stopped driving the car the waited for thunderstom to stop. Suddenly he noticed a child walking alone on the road. He asked the boy to come inside the car till the thunderstorm stopped. Dr. Pathak dropped the boy at his residence. The boy insisted that Dr. Pathak should meet hsi parents. The parents expressed their gratitude to Dr. Pathak for his concern for safety of the child. Answer the following questions based on the above information: (a) Why is it safer to sit inside a car during a thunderstorm? (b) Which two values are displayed by Dr. Pathak in his actions? (c ) Which values are reflected in parents response to Dr. Pathak ? (d) Give an example of a similar action on your part in the past from everyday life.

On a straight road a thief, seeing a police car approaching at a constant speed v, runs away on a bike with constant accelration 'a'. Which of the following position time graphs best represent the case in which the theif is just nabbed ?