Question

A person on a bicycle is travelling at 10 km/hr towards an organ
which is playing a 130 Hz sound.

Calculate the frequency of the sound wave which she hears. (Assume
that the speed of sound is

340 ms-1).

Answer #1

1) A car is approaching a reflecting wall. A stationary observer
behind the car hears a sound of frequency 790 Hz from the car horn
and a sound of frequency 873 Hz from the wall.
(a) How fast is the car traveling?
.......... km/h
(b) What is the frequency of the car horn?
........... Hz
(c) What frequency does the car driver hear reflected from the
wall?
............ Hz
------------------------------------------------------------------------------------------------
2) A bat flying toward an obstacle at 10 m/s...

(1) Suppose an oncoming ambulance moving at 115 km/h emits a
steady 810-Hz sound from its siren.
Part (a) What frequency, in Hz, is received by
a person watching the oncoming ambulance? The speed of sound on
this day is 345 m/s.
Part (b) What frequency, in Hz, does she
observe after the ambulance has passed?
(2). In this problem take the speed of sound to be 349 m/s.
How fast, in meters per second, does an observer need to...

A. What is the intensity in 10-4 watts per meter
squared of 112 dB sound?
B.A spectator at a parade receives an 886 Hz tone from an
oncoming trumpeter who is playing an 863 Hz note. At what speed is
the musician approaching if the speed of sound is 336 m/s?
C. What frequency is received by a person watching an ambulance
moving away at 89 km/h and emitting a steady 774 Hz sound from its
siren? The speed of...

A stone is dropped from the top of a cliff. The splash it makes
when striking the water below is heard 3.2 s later. How high is the
cliff?
2. The pressure variation is a sound wave is given by Δ P =
0.0035 sin (0.38 π x – 1350 π t) Determine a. the wavelength b. the
frequency c. the speed and d. the displacement amplitude of the
wave. Assume the density of the medium to be 2.2 x...

⦁ A person sitting in a stationary boat notices that
it takes the water waves 2 seconds to pass the entire length of the
boat that is 12 m. Calculate the speed of the water waves. Show
your calculation.
12/2 = 6m/s
⦁ The person in Question #1 also notices the water
waves passing by the bow of the ship once every 4 seconds. b) What
are the frequency and c) the wavelength of the water waves? Show
all your...

1. A cord of mass 0.65 kg is stretched between two supports 8.0
m apart. If the tension in the cord is 140 N, how long will it take
a pulse to travel from one support to the other?
2. A 50.0 Kg ball hangs from a steel wire 1.00 mm in diameter
and 6.00 m long. What would be the speed of a wave in the steel
wire?
3. The intensity of an earthquake wave passing through the earth...

1. When light passes from an unknown material into air it bends
away from the normal. For a certain ray, the angle of incidence is
43 degrees but the refracted ray is perpendicular to the normal.
How fast does light travel in the unknown material? Answer in
km/s
2.During a halftime show, a flute player marches behind tuba
player. Although both players are marching in the same direction,
the (very swift) flute player marches at 21.1 m/s while tuba player...

Find the speed [km/h] at which Superman
(mass=85 kg) must fly into a train (mass = 19000 kg) traveling at
77 km/hr to stop it?
A: 1.38×104
B: 1.72×104
C: 2.15×104
D: 2.69×104
E: 3.36×104
Tries 0/1
Running into the train at that speed would severely damage both
train and passengers.
Calculate the minimum time [s] Superman must take
to stop the train, if the passengers experience an average
acceleration of -0.44*g (g = 10
m/s2)?
A: 1.59
B: 2.31...

1. A howler monkey is the loudest land animal and, under some
circumstances, can be heard up to a distance of 6.78 km. Assume the
acoustic output of a howler to be uniform in all directions and
that the threshold of hearing is 1.0 × 10^12 W/m2. The acoustic
power, in mW, emitted by the howler is closest to
2. The sound from a single source can reach point O by two
different paths. One path is 19.9 m long...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 9 minutes ago

asked 9 minutes ago

asked 9 minutes ago

asked 12 minutes ago

asked 23 minutes ago

asked 34 minutes ago

asked 36 minutes ago

asked 53 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago