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A bird-watcher is hoping to add the white-throated sparrow to her "life list" of species. Person, only 1.00 m from the bird, hears the sound with an intensity of 1.08 x 10-5W/m2.
How far could she be from the bird and still be able to hear it? Assume no reflections or absorption of the sparrow's sound.
an earthquake produces two basic types of waves surface waves and bulk waves. the former move along the surface of the
As it enters the uniform magnetic field within the solenoid, its speed is 790 m/s and its velocity vector makes an angle of 30 degree with the central axis of the solenoid. Find how many revolutions does the electron make along its helical path wi..
A certain lightbulb has a tungsten filament with a resistance of 19.4 ? when at 20.0°C and 150 ? when hot. Assume the resistivity of tungsten varies linearly with temperature even over the large temperature range involved here. Find the temperature o..
Assuming that Galaxy A is intrinsically of identical luminosity to Galaxy B, how does its apparent brightness on the night sky compare to that of Galaxy B? How many times brighter or fainter is it?
Approximation the electrical energy stored in the atmosphere, if the earth's electric field extends upward for 1700 m. and has average magnitude of 170 V./m. Treat the atmosphere as a rectangular layer with an area equivalent to the surface area of t..
Detect burglars entering windows: Describe how you will design a device that uses electromagnetic induction to detect a burglar opening a window in your ground floor apartment. Include drawings and a word description.
A copper wire has a diameter of 1.692 millimeter. Find what magnitude current flows when the drift velocity is 1.40 mm/s
A small block on a frictionless horizontal surface has a mass of 2.25×10?2kg . It is attached to a massless cord passing through a hole in the surface. (See the figure below (Figure 1) .) The block is originally revolving at a distance of 0.255m from..
If you drop an aspirin and it takes 0.18 sec to hit the table, how high above the table was the aspirin when it released?
What is the amplitude of subsequent oscillations
A projectile is fired with an initial velocity of 20 m/s at 50° above horizontal. At the projectile's highest point, what is its velocity?.What is its acceleration?
A train with a total mass 8.00E+6kg rises 775m as it travels a distance of 55.0km along a steady slope at a constant speed of 16.0km/hr. The frictional force on the train is 0.600 percent of the weight. Discover the kinetic energy of the train. Disco..
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