Physics, 26.03.2020 05:58 mxhx

U.2
HyUCHLICS ULLSC
9. While standing near a railroad crossing, a person hears a distant train hom. According to the train's
engineer, the frequency emitted by the horn is 440 Hz.
a) What would be the frequency heard by the person if the train were at rest?
b) What would be the frequency that reaches the bystander as the train approaches the crossing?
e) What would be the frequency that reaches the bystander once the train has passed the crossing?
10. An alarm clock is dropped off the edge of a tall building. You, standing directly under it, hear a tone of
1350 Hz coming from the clock just before you duck out of the way and it hits the ground. Would the actual
frequency of the clock be higher or lower than what you heard?
11. Two identical cars are driving toward one another and sounding their horns. You're the driver of one of
the cars. You measure your car's horn to be sounding at 512 Hz, but you measure the horn of the other car to
be sounding at 600. Hz. Are these measurements reasonable? Why?

Answers: 3

Show answers

Another question on Physics

Physics, 22.06.2019 00:20

Consider the particle-in-a-box problem in 1d. a particle with mass m is confined to move freely between two hard walls situated at x = 0 and x = l. the potential energy function is given as (a) describe the boundary conditions that must be satisfied by the wavefunctions ψ(x) (such as energy eigenfunctions). (b) solve the schr¨odinger’s equation and by using the boundary conditions of part (a) find all energy eigenfunctions, ψn(x), and the corresponding energies, en. (c) what are the allowed values of the quantum number n above? how did you decide on that? (d) what is the de broglie wavelength for the ground state? (e) sketch a plot of the lowest 3 levels’ wavefunctions (ψn(x) vs x). don’t forget to mark the positions of the walls on the graphs. (f) in a transition between the energy levels above, which transition produces the longest wavelength λ for the emitted photon? what is the corresponding wavele

Answers: 1

Answer

Physics, 22.06.2019 04:30

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

Answers: 1

Answer

Physics, 22.06.2019 08:30

You win the lottery and decide to impress your friends by exhibiting a million-dollar cube of gold. at the time, gold is selling for $ 426.60 per troy ounce, and 1.0000 troy ounce equals 31.1035 g. -how tall would your million-dollar cube be? en cm

Answers: 2

Answer

Physics, 22.06.2019 09:10

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Answers: 1

Answer

You know the right answer?

U.2
HyUCHLICS ULLSC
9. While standing near a railroad crossing, a person hears a distant...

Questions