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A source emits sound uniformly in all directions. A radialline is drawn from this source. On this line, determine the radialpositions of two points, 1.28 m apart, such that the intensitylevel at one point is 2.46 dB greater than that at the other. (a) What is the smaller radial position (in m)?(b) What is the larger radial position (inm)?
In creating his definition of horsepower, James Watt, the inventor of the steam engine, calculated the power output of a horse operating a mill to grind grain or cut wood, Calculate the power output, in hp, of a 72-kg human being
A force does +130J of work while it acts on a moving object and its direction is in the same direction as the object's displacement. How much work does this force do as the angle between it and the object's displacement is 56°.
an electric current of 1.00 A is flowing through a copper filament diameter 1.00 mm, calculate the average electron velocity v and the ?- factor, the positive and negative charge densities in the S' frame
question1a source emits 531.62-nm and 531.81-nm light.awhat least number of grooves is required for a grating that
A long transmission wire carries an AC current given by I=400 sin(120pi*t). The transmission wire is parallel to the x-axis and located at y=0, z=20. What will be the induced voltage in the loop
A roller coaster at the Six Flags Great America amusement park in Gurnee, Illinois, incorporates some clever design technology and some basic physics. What is the radius of the arc of the teardrop at the top
a 1200 kg car going 25m/s is brought to stop using its brakes. what is the change in temperature of the brakes and wheels
two point charges -2q and 3q are on the x-axis -2q at the origin and 3q at x d. choose the potential to equal zero at
In a certain binary-star system, each star has the same mass which is 2.0 times of that of the Sun, and they revolve about their center of mass. The distance between them is the 5.9 times the distance between Earth and the Sun. What is their period o..
A fishing line has attached to it a hollow plastic float 2.15 cm in diameter and having a mass of 1.90 g. Find the mass of a lead weight
A 25.0g sample of copper at 363 K is placed in 100g of water at 293 K. Calculate final temperature of the water
A proton is moving in a circular orbit in a uniform magnetic field perpendicular to the orbit plane. calculate the magnetic force on the proton
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