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A man stands at the midpoint among two speakers that are broadcasting an amplified static hiss uniformly in all directions. The speakers are 28.2 m apart and the total power of the sound coming from each speaker is 0.470 W.
a) Discover the total sound intensity that the man hears when he is at his initial position halfway among the speakers.
b) Discover the total sound intensity that the man hears after he has walked 4.4 m directly toward one of the speakers.
suppose that protons are fired towards the large flat side of a charged conducting plate. initial speed of the protons
A 100 W light bulb has a resistance of about 12 ohms when cold (20 degrees C) and 140 ohms when hot. Estimate the temperature of the filament
a charged particle is moving downward with an initial speed of 5 times 106 ms when it encounters a uniform magnetic
A block of mass 3.0 kg slides toward the right on a frictionless surface with v0 = 7.5 m/s. What is the position xf where the block stops
Water flows steadily from an open tank as shown in the figure. The elevation of point 1 is 10.0 meters, and the elevation of points 2 and 3 is 2.00 meters. The cross-sectional area at point 2 is 0.0480 square meters; at point 3, where the water is di..
A molecule of DNA is 2.17 micrometers (10^-6 meters)long. The ends of the molecule become singly ionized -negative on one end, positive on the other. Determine the effective spring constant
In the Bohr theory of the hydrogen atom, an electron moves with constant speed in a circular orbit about a proton, where the radius of the orbit is 0.53 x 10-10 m, Determine the electrostatic force exerted by the proton on the electron
A long circular pipe with outside radius R carries a (uniformly distributed) current i = 25 A into the page as shown in the figure. A wire runs parallel to the pipe at a distance 3R from center to center.
A 72.5-kg tourist climb the stairs to the washingtonmonument,which is 555 ft high. How far does the earth move in the opposite direction as the tourist climbs?
if you have available several 3.0-uf capacitors each capable of withstanding 200v without breakdown how would you
When a voltage of 16.0 V is applied across the two ends of a cylindrical wire of length l, radius r and resistivity p, What is the electric current measured in this second wire
A 51-kg skier coasts up a snow-covered hill that makes an angle of 25° with the horizontal. What is the magnitude of the kinetic frictional force
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