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A tornado Siren emits 3000 W of sound power, radialy equal in all directions.
a) What si the intensity of sound 40.0 m from the speaker.
b) What is the sound intensity Level.
c) Assume the weakest sound likely to be heard over background noise is 55dB. What is the maximum distance the iran can be heard?
The electric potential at a position located a distance of 18.0 mm from a positive point charge of 7.60×10-9C, Calculate the value of the second charge
A narrow beam containing red (660 nm) and blue (470 nm) wavelengths travels from air through a 2.60 cm thick flat piece of crown glass and back to air again. At what angles do the the two colors emerge from the glass
A 60.0-g object is attached to a horizontal spring with a force constant of 15.0 N/m, What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless
Calculate the firm's earnings per share (EPS). Explain how large a per-share cash dividend did the firm pay on common stock during 2011?
Two equal charges Q are positioned at points (x=l, y=0) and (x=-1, y=0).Find where the field is a maximum. define your answer in terms of the variables , , and appropriate constants. If there is more than one answer, separate them by a comma.
Two gliders are tied together by a string after they are connected together by a compressed spring on an airtrack. find the mass of Glider B
At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. What is the radius of a chamber
A parallel-plate capacitor is made from two aluminum-foil sheets, each 5.6 wide and 6.0long. evaluate the capacitance of this capacitor
A typical wall outlet is 120 volts in the U. S. Personal MP3 players require much smaller voltages, calculate the number of turns on the secondary coil of the adapter transformer
Find out ratio of the detector
questionyou are standing 0.75 m from your bathroom mirror in morning. how far away is your image from you? answer is
What was the velocity of the bullet just before it struck the wooden block? The length of the string is 2 meters.
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