Estimate the frequency of waves reflected back to detector

Assignment Help Physics
Reference no: EM13654537

A stationary detector sends out a sound wave of frequency0.305 MHZ toward an approaching car. The speed of the car is 40m/s.

a) What is the frequency of the wave as observed by anobserver in the car.

b) What is the frequency of the waves reflected back to the detector.

Reference no: EM13654537

Questions Cloud

Define the ph of solution when it''s at its equivalence point : The solution is also at it's equivalence point, where all moles of scid have nuetralized all moles of base. What is the pH of this solution when it's at its equivalence point
Find the momentum and kinetic energy of each particle : A neutron (mn = 939.6 MeV/c2 ) atrest decays into a proton (mp = 938.3MeV/c2), an electron (me = .5MeV/c2), and an antineutrino(mμ= 0). Find the momentum and kinetic energy of each particle
What is the rotational energy about its center of mass : A cylinder of mass 11.0 kg rolls without slipping on a horizontal surface. At time t, its center of mass hasa speed of 14.0 m/s.
In an ordinary crime : Read the passage from Act III of The Crucible that begins with Danforth saying "Mr. Hale, you surely do not doubt my justice" and ends when Parris says, "this man is blackening my name.
Estimate the frequency of waves reflected back to detector : A stationary detector sends out a sound wave of frequency0.305 MHZ toward an approaching car. The speed of the car is 40m/s. What is the frequency of the waves reflected back to the detector
Evaluate the specific heat of the metal sample : A 36.5 g sample of the metal is taken from a boiling water bath at 100.0°C and placed in the calorimeter. The equilibrium temperature of the water and sample is 32.5°C. The calorimeter constant is 1.87 J/°C. Calculate the specific heat of the meta..
Directionof the change in the linear momentum : A 2000 kg truck traveling north at 41 km/h turns east andaccelerates to 57 kn/h. What is the change in thetruck’s kinetic energy? What is the magnitude of the change in the linear momentum of the truck (kg m/s)? What is the directionof the change in ..
How to compute the mass in grams of hydrogen chloride : Calculate the mass in grams of hydrogen chloride produced when 5.60 L of molecular hydrogen measured at STP reacts with an excess of molecular chlorine gas.
What rateis energy lost to thermal energy in resistor : The figure below shows a resistor of resistance R = 6.16Ω connected to an ideal battery of emf = 14.9 V bymeans of two copper wires. Each wire has length 23.2 cm and radius3.40 mm. In dealing with such circuits in this chapter, wegenerally neglect..

Reviews

Write a Review

Physics Questions & Answers

  How much does the internal energy change

A fluid in an insulated, flexible bottle is heated by a high resistance wire and expands. If 9kJ of heat is applied to the system and it does 5kJ of work, how much does the internal energy change?

  Find the greatest force that octopus can exert in salt water

A very powerful octopus uses one sucker of diameter2.93 cm on each of the two shells of aclam in an attempt to pull the shells apart. Find the greatest force that the octopus can exert in salt water 32.3 m depth

  Determine the heliums velocity

A proton (mass 1.67*10 ^-27 kg) is moving at 1.40*10 ^-6 m/s directly toward a stationary helium nucleus (mass 6.64*10 ^-27 kg), After a head-on elastic collision, what is the helium's velocity

  Direct measurement of the spread of the photon energy

In special conditions, it is possible to measure the energy of a gamma-ray photon to 1 part in 10^15. For a photon energy of of 50 keV, estimate the maximum lifetime that could be determined by a direct measurement of the spread of the photon energy.

  What speed would such a meteor give earth in a head

Imagine that Earth is struck by a meteor with a mass of 5.23 x 1015 kg, and a speed of 8100 m/s. What speed would such a meteor give Earth in a head-on collision

  Strength of the gravitational field on surface of the moon

The mass of the moon is 7.3*10^22 kg and its radius if 1785km. What is the strength of the gravitational field on the surface of the moon?

  What is the ratio of their speeds at that instant

Two cars leave a stoplight, one 0.5128 s before the other. The second car accelerates with twice the acceleration of the first. What is the ratio of their speeds at that instant

  Evaluate the power being supplied by the battery

A 9.4-V battery, a 5.08-? resistor, and a 9.9-H inductor are connected in series. After the current in the circuit has reached its maximum value, evaluate the power being supplied by the battery

  What are frequency and wavelength of emitted sound wave

A violin string 15.2 cm long and fixed at both ends oscillates in its n = 3 mode. The speed of waves on the string is 273 m/s, and the speed of sound in air is 348 m/s. What are (a) the frequency and (b) the wavelength of the emitted sound wave?

  What is the magnitude of the force exerted on the electron

If the magnetic field of the wire is 2.0×10?4 and the electron moves at 1.0×107 , what is the magnitude of the force exerted on the electron

  Determine the speed of the first marble

A 50g marble moving at 2.2m/s strikes a 30g marble at rest. Assume the collision is perfectly elastic and the marbles collide head-on. What is the speed of the first marble

  Which one reaches the bottom of the incline first

A sphere, a solid cylinder and a thin-walled hollow cylinder all have the same mass and radius. Which one reaches the bottom of the incline first

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd