Examlex
The siren on a police car emits waves with a frequency f = 500 Hz. You are standing by the side of the road when a police car, sounding its siren, approaches you at 30.0 m/s. What frequency do you hear? The speed of sound is 340 m/s.
Q1: In simple harmonic motion, the acceleration is
Q7: When both the pressure and the absolute
Q12: In designing buildings to be erected in
Q15: A U-tube is open to the atmosphere
Q15: A 0.640-m long gas column is open
Q17: A mass of 1000 kg hangs at
Q21: A charge Q is uniformly distributed throughout
Q25: Two long straight parallel lines of charge,
Q31: State the law of conservation of angular
Q33: A crank is being turned clockwise at