1. A commuter train passes a passenger platform at a constant speed of 41.7 m/s. The...

1. A commuter train passes a passenger platform at a constant speed of 41.7 m/s. The train horn is sounded at its characteristic frequency of 350 Hz.

(a) What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding? (Indicate whether the frequency increases of decreases with the sign of your answer.)
(b) What wavelength is detected by a person on the platform as the train approaches?

2. Two small speakers are driven by a common oscillator at 8.55 ✕ 10² Hz. The speakers face each other and are separated by d = 1.23 m.

Locate the points along a line joining the two speakers where relative minima would be expected. (Use v = 343 m/s. Choose one speaker as a reference and enter your answers as positive distances from this speaker, from smallest to largest. There are 6 boxes. Enter NONE in unused answer boxes.) Unit in m.

Expert Solution

genius_generous answered 1 year ago

A commuter train passes a passenger platform at a constant speed of 38.1 m/s. The train...

A commuter train passes a passenger platform at a constant speed of 38.1 m/s. The train horn is sounded at its characteristic frequency of 340 Hz. (a) What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding? (Indicate whether the frequency increases of decreases with the sign of your answer.) Hz (b) What wavelength is detected by a person on the platform as the train approaches? m

A passenger on a moving train walks at a speed of 1.60 m/s due north relative...

A passenger on a moving train walks at a speed of 1.60 m/s due north relative to the train. The passenger's speed with respect to the ground is 4.5 m/s at an angle of 35.0° west of north. What are the magnitude and direction of the velocity of the train relative to the ground? _______m/s direction ______ ° west of north

A truck traveling at a constant speed of 28 m/s passes a more slowly moving car....

A truck traveling at a constant speed of 28 m/s passes a more slowly moving car. The instant the truck passes the car, the car begins to accelerate at a constant rate of 1.2 m/s^2 and passes the truck 545 m farther down the road. What was the speed of the car (in meters/second) when it was first passed by the truck?

(a)A light-rail commuter train accelerates at a rate of 1.45 m/s2. How long (in s) does...

(a)A light-rail commuter train accelerates at a rate of 1.45 m/s2. How long (in s) does it take to reach its top speed of 80.0 km/h, starting from rest? s (b)The same train ordinarily decelerates at a rate of 1.95 m/s2. How long (in s) does it take to come to a stop from its top speed? s (c)In emergencies the train can decelerate more rapidly, coming to rest from 80.0 km/h in 8.30 s. What is its emergency deceleration...

PART 1: A train moves with constant velocity down a straight track that passes through a...

PART 1: A train moves with constant velocity down a straight track that passes through a tunnel. When the train is at rest with respect to the tunnel, the train is exactly the same length as the tunnel. However, the train in this case is moving relative to the tunnel at nearly the speed of light. The engineer on the train says: “The tunnel is Lorentz-contracted and is shorter than the train; therefore at no time can the train be...

A 425-m long spaceship passes by an observer at the speed of 2.60×108 m/s. What length...

A 425-m long spaceship passes by an observer at the speed of 2.60×108 m/s. What length does the observer measure for the spaceship? .... m What is the rest energy of 37 g of shelled peanuts? .... J Find the energy in joules of a single photon of microwave radiation with the wavelength of 0.76 cm..... J Using the Bohr model, find the wavelength in nanometers of the radiation emitted by a hydrogen atom, when it makes a transition from...

A high speed train travels through a station without slowing. An accordionist playing on the platform...

A high speed train travels through a station without slowing. An accordionist playing on the platform notices that the pitch of the train’s horn is different as it approaches compared to the pitch after it has passed. Furthermore she notices that the ratio of the frequencies is 3/2. 6. Find a value for the speed of the train. 7. The accordionist also notices that when the train is precisely 14.4 m away from her the sound level is 110 dB....

A fugitive tries to hop on a freight train traveling at a constant speed of 5.0...

A fugitive tries to hop on a freight train traveling at a constant speed of 5.0 m/s. Just as an empty box car passes him, the fugitive starts from rest and accelerates at a = 4.0 m/s2to his maximum speed of 8 m/s. (a) How long does it take him to catch up to the empty box car? _____________ s (b) What is the distance traveled to reach the box car? _____________ m

A very metal train moving at a constant speed is passing a hippie observer on a...

A very metal train moving at a constant speed is passing a hippie observer on a platform. On one of the train cars, a Deathcore guitarist is continually hammering out a note at a frequency of 450 Hz. After the guitarist has passed, the hippie hears the sound with a frequency of 420 Hz. What is the speed of the train? Please explain work, I always rate!!:)

A sailboat runs before the wind with a constant speed of 3.5 m/s in a direction...

A sailboat runs before the wind with a constant speed of 3.5 m/s in a direction 28 ∘ north of west. You may want to review (Pages 89 - 92) . How far west has the sailboat traveled in 22 min? How far north has the sailboat traveled in 22 min?

Question