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The intensity of the sound wave from a jet airplane as it is taking off is 85 W/m2 at a distance of 4.0 m. What is the intensity of the sound wave that reaches the ears of a person standing at a distance of 120 m from the runway? Assume that the sound wave radiates from the airplane equally in all directions.
A sailboat is traveling east at 5.0 m/s . A sudden gust of wind gives the boat an acceleration a = (0.80 m/s^2 , 40 degrees north of east). A)What is the boat's speed 4.5s later when the gust subsides? B)What is the boat's direction 4.5s later whe..
A proton is located at the origin, and a second proton is located on the x-axis at x=6.00 fm. (a) compute the electric potential energy associated with this configuration.
A charged particle of mass m and charge q is suspended from a light thread in a region of space where there is a uniform horizontal electric field. find the angle between the thread and a vertical line
A tube of air is open at only one end and has a length of 1.29 m. What is the distance between one node and the adjacent anti-node
A car is moving at 9 m/s along a curve on a horizontal plane with radius of curvature 46 m. The acceleration of gravity is 9.8. Find the rotational frequency of the wheel
A solid disk of mass M and radius R is pivoted so that it can rotate about its center. The disk is initially at rest. A ball of mass m and speed v travels along a path tangential to the rim of the disk.
how to convert ac current to dc current? is there any conversion factor? how to select an autotransformer for dc motors
An ambulance with its siren at frequency 700 Hz is racing down the highway at 50m/s, What is the wavelength of sound in front of the ambulance
question1a football player runs directly down the field for 26 m before turning to the right at an angle of 20 degrees
You ionize a hydrogen atom with a photon with wavelength 77.5nm. What orbital was the electron in before ejection
In a proton linear accelerator, a 8.4mA proton current hits a target. How many protons hit the target each second
You illuminate a slit of width 0.0667 mm with light of wavelength 721 nm, What is the width, in centimeters, of the pattern's central maximum
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