### The average power and intensity level of a horn’s sound

Assignment Help Physics
##### Reference no: EM1312565

Question 1. Find the difference in decibel levels β1 & β2 of a sound source is related to the ratio of its distances r1 & r2 from the receiver by the formula

Question 2. A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 50dB by an observer 10 km away.
(A) Find the average power generated by the horn?
(B) What intensity level of the horn’s sound is observed by someone waiting at an intersection 50m from the train?

#### Questions Cloud

 The mass of a ball and speed of a puck after collision : Compute the mass of a ball and speed of a puck after collision. Computing the takeoff speed and kinetic energy : Computing the kinetic energy, takeoff speed, and kinetic energy per kilogram. Newton’s third law : The famous horse & cart physics scenario is explained. This scenario is used to describe why many people have a common misconception about what Newton’s 3rd Law says & does not say. Velocity of the objects in terms of air resistance : Explain the velocity of two different objects: heavy rock & light feather. 1st, describe what happens when the two objects are dropped on Earth. 2nd, compare this to what happens on the Moon. The average power and intensity level of a horn’s sound : Find the difference in decibel levels β1 & β2 of a sound source is related to the ratio of its distances r1 & r2 and find the average power generated by the horn. Hire a man crew members : Suppose the owner of the trawler can sell al the fish caught for \$75 every 100 pounds also can hire a man crew members as desired by paying them \$150 every week. Taiwans government hoped would emerge in its epzs : Illustrate what is the "incubator effect" that Taiwan's government hoped would emerge in its EPZs. Intermediaries come from a competitive marketplace : change if buyers pay \$8 every unit to the intermediary but sellers offer to rebate part of that expense to buyers. The location at which the tuning is formed : Determine the location at which the tuning is formed and the vibrating frequency of a string to form a standing wave pattern.

### Write a Review

#### What is the block''s distance from equilibrium

A stretched rubber band has the length of 0.04 m and a fundamental frequency of 462 Hz. What is the speed at which waves travel on the rubber band.

#### What is the maximum speed the masses

What is the maximum speed the masses

#### What is constant acceleration

What is constant acceleration

#### Find out the magnitude of electric field at a point

An alpha particle (m = 6.7 x 10^-27kg, q = +3.2 x 10^-19C) has a speed of 30km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle throughout this motion. Find out the electric potential difference.

#### How fast does it move after the bullet emerges

Therefore of his observations, Ole Roemer concluded that eclipses of Io by Jupiter were delayed by 22 min throughout a six-month period as the Earth moved from the point in its orbit where it is closest to Jupiter to the diametrically opposite point ..

#### The total mass inside a sphere of radius r

A submarine dives 90.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of submarine's displacement? (Imagine that upward and the direction of the submarine's horizontal motion is positive.)

#### What is specific gravity of this other fluid

What is specific gravity of this other fluid

#### What is the wavelength of these gamma rays

A child slides down a slide with the 29 degree incline, and at the bottom her speed is precisely half of what it would have been if the slide had been frictionless. Compute the coefficient of sliding between the child and the slide.

#### Problem on the velocity of boat

Problem on the  velocity of boat

#### What is the speed of the water leaving the nozzle

What is the speed of the water leaving the nozzle

#### The internal energy of the coin

The internal energy of the coin

#### Find out the equilibrium readings of both scales

A large cylindrical water tank is mounted on a platform with its central axis vertical. The water level is 3.75 m above the base of the tank, and base is 6.50 m above the ground. A small hole 2.23 mm in diameter has formed in the base of the tank. Bo..