Physics

Similar Questions

1. Physics

   Two cars have identical horns, each emitting a frequency of f= 395 hz. One of the cars is moving with a speed of 12 m/s toward a bystander waiting at a corner, and the other car is parked. The speed of sound is 343 m/s. what is

2. statistics

   12. Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three cars; nineteen generally sell four cars; twelve generally

3. physics

   The siren on an ambulance is emitting a sound whose frequency is 2421 Hz. The speed of sound is 343 m/s. (a) If the ambulance is stationary and you (the "observer") are sitting in a parked car, what are the wavelength and the

4. ALGEBRA

   a policeman is pursuing a snatcher who is ahead by 72 of his own leaps. the snatcher takes 6 leaps while the cop takes 5 leaps, but 4 leaps of the snatcher are as long as 3 leaps of the cop. how many leaps will the cop make before

1. physics

   A siren mounted on the roof of a firehouse emits sound at a frequency of 900 Hz. A steady wind is blowing with a speed of 15 m/s. Take the speed of sound in calm air to be 343 m/s. (c) Firefighters are approaching the siren from

2. Physics

   A child bounces a 48 g superball on the sidewalk. The velocity change of the superball is from 22 m/s downward to 19 m/s upward. If the contact time with the sidewalk is 1 800 s, what is the magnitude of the average force exerted

3. PHYSICS

   The frequency of an ambulance siren is 700 Hz. If a pedestrian on the side of the road hears the siren at 756 Hz approximately how fast and in what direction is the ambulance moving? The answer is 90 km/h and towards the

4. physics

   A train whistle emits a sound with a frequency of 1000 Hz when standing in the station. If the same whistle is blown when it is moving away from the station at 40 mph what will be the approximate frequency someone standing at the

1. Physics

   A 38.0-kg boy, riding a 2.37-kg skateboard at a velocity of +5.07 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.06 m/s,

2. Physics

   a)What frequency is received by a person watching an oncoming ambulance moving at 120 km/h and emitting a steady 700 Hz sound from its siren? The speed of sound on this day is 345 m/s. b)What frequency does she receive after the

3. physics

   at a distance of 3.8 m from a siren, the sound intensity is 3.6 x 10-2 W/m2. Assuming that the siren radiates sound uniformly in all directions, find the total power radiated.

4. physics

   a car, moving at 100 mi/hr, passes a stationary police car whose siren has a frequency of 500 Hz. what is the frequency change heard by observer in the moving car as he passes the police car? the velocity of sound in air is 343

Still need help? You can ask a new question.