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The sound intensity level at a rock concert is 114 dB, while that at a jazz fest is 84.5 dB. Find the ratio of the sound intensity at the rock concert to that at the jazz fest.
A sound wave with an intensity level of 81.0 dB is incident on an eardrum of area0.600 10-4 m2. How much energy is absorbed by the eardrum in 4.0 minutes
A sinusoidal electromagnetic wave having a magnetic field of amplitude 1.25\mu {\rm T} and a wavelength of 432{\rm nm} is traveling in the + x direction through empty space. What is the amplitude of the associated electric field
The moment of inertia of a 0.92 kg bicycle wheel rotating about its center is 0.139 kg m^2. What is the radius of this wheel, assuming the weight of the spokes can be ignored
The eyepiece of a refracting astronomical telescope (see the figure) has a focal length of 8.75 c. What is the angular magnification of the telescope
A 1000 {rm kg} wrecking ball hangs from a 15 {rm m}-long cable. The ball is pulled back until cable makes an angle of 25.0^circle with the vertical. By how much has the gravitational potential energy of the ball changed .
imagine punch lives on the earth at rest. judy traveling past the earth with a speed of 0.600 c. if a rocket moving
An ideal gas at 26.3°C and a pressure 1.80 105 Pa is in a container having a volume of 1.00 L. Determine the number of moles of gas in the container. Your response differs from the correct answer by more than 10%. Double check your calculations. m..
Steel train rails are laid in 12.2 m -long segments placed end to end. The rails are laid on a winter day when their temperature is-2.00degrees C. How much space must be left between adjacent rails
What is the magnitude of the electric force of attraction between an iron nucleus (q=+26e) and its innermost electron if the distance between them is 1.5 x 10^-12m
marsha hits a tennis ball upward from the top of a 90-foot-high cliff with an initial velocity of 16 fts. marsha hit
A 31.0cm focal length converging lens is 24.0 cm behind adiverging lens. Parallel light strikes the diverging lens. What is the focal length of the diverging lens
A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 260 kg · m2 and is rotating at 8.0 rev/min about a frictionless vertical axle, What is the new angular speed of the merry-go-round
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