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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?
A film of MgF2 (n = 1.38) having thickness 1.68 10-5 cm is used to coat a camera lens. What are the three longest wavelengths that are intensified in the reflected light
A wire loop that encloses an area of 10 cm2 has a resistance of 5 Ohms. How much charge flows past a point in the wire
A car traveling at 86 km/h strikes a tree. The front end of the car compresses, What was the average acceleration of the driver during the collision
A large group of football fans comes to the game with colored cards that spell out the name of their team when held up simultaneously. Most of the cards are colored blue, find the maximum diameter (in mm) of the spectator's pupils
A 120 V rms voltage at 60 Hz is applied across a 10 uF capacitor and an unknown resistor. what is the value of the resistor
A space ship is approaching a space station of 1.2 x 10^5 m/s. compute the frequency of the beacon observed on the spaceship
A swimming pool has dimensions 32 m 9 m and a flat bottom. The pool is filled to a depth of 1.50m with fresh water. What is the force exerted by water on the bottom.
a rock is tossed off the top of a cliff of height 34.5m. its initial speed is 29.1m/s and the launch angle is 30.2degrees with respect to the horizontal. what is the speed with which the rock hits the ground
question1the press box at a baseball park is 36.0 ft above the ground. a reporter in the press box looks at an angle of
An electron is at the origin. (a) Calculate the electric potential VA at point A, x = 0.310 cm. V (b) Calculate the electric potential VB at point B, x = 0.770 cm. V What is the potential difference VB - VA
Wile E. Coyote and the Roadrunner are fictional cartoon characters. The premise of the cartoon is that Wile E. What is the magnitude of the impulse on the second wagon
An electric field of magnitude 190 V/m is directed perpendicular to a circular planar surface with radius 6.39 cm, determine the magnitude of the magnetic field at a radial distance 11.1 cm away from the center of the circular area
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