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A source emits sound uniformly in all directions. A radial line isdrawn 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 (in m
A ship on the surface of the ocean receives a sonar echo back from an underwater object. The echo path from the object to the ship is at an angle of 22 degrees above the horizontal and takes 2.5s to return. (Velocity of sound in sea water = 1500m/s)...
A sphere completely submerged in water is tethered to the bottom by a string. The tension in the string is 1/5 (aka one-fith) the weight of the sphere. What is the density of the sphere
A gas is contained in a cubic box whose sides are 3m long. If the gas is initially at 80 K, and it is heated up to 320 K at constant volume, What is the final pressure
A typical ten-pound car wheel has a moment of inertia of about. The wheel rotates about the axle at a constant angular speed making 60 full revolutions in a time interval of 5.
In a specific heat experiment 210.0 grams of aluminum (C=913.0 J/kg.K) at 100.0°C) is mixed with 36.0 g water at 20.0°C. Find the entropy change of the water
3 amperes of current flow through a wire. What net charge flows past a point in the wire each second
Water is flowing through a V-shaped weir, which has a 30° vertex. What is the distance from the surface of the water to the vertex
A student weighing 800 N crouches on a scale and suddenly springs vertically upward.His roommate notices that the scale reads 900 N, With what acceleration does he leaves the scale
Find the work done by this force on the particle and the final speed of the particle as it moves along a path.
The meteoroid that creates a meteor has a typical mass of about 1 g (and burns up about 100 km above the Earth's surface). Estimate the amount of mass of meteoroids that enters the Earth's atmosphere per year
A car starts from rest and travels for 4.92 s with a uniform acceleration of +1.49 m/s2. How far has the car gone
The focal length of a lens is inversely proportional to the quantity (n ? 1), where n is the index of refraction of the lens material. The value of n, however, depends on the wavelength of the light that passes through the lens. where will the vi..
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