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1) A source emits sound waves isotropically. The intensity of the waves at a distance of 2.50 m from the source is 1.91×10-4 W/m2. What is the power of the sound at the source?
2) A certain sound source is increased in sound level by 30.0 dB. By what multiple is its intensity increased?
3) A point source emits 30.0 W of sound isotropically. A small microphone intercepts the sound at a distance of 200 m from the source. What is the sound level at the microphone?
4) If the microphone in problem 3 has an area of 0.750 cm2. What is the power intercepted by the microphone?
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The incident electron loses energy The incident electron emits an x-ray.
A baseball player runs 27.4meters from the batter's box to first base,overruns first base by 3.0 meters,and then returns to first base. Compared to total distance traveled by the player,the magnitude of the players total displacement from the batt..
A woman of mass 60 kg runs at a speed of 5 m/s towards a carousel and jumps onto it at the very edge. what is the angular velocity of the carousel
A rifle is aimed horizontally at a target 51 {rm m} away. The bullet hits the target 1.5 {rm cm} below the aim point. What was bullet's speed as it left the barrel.
If the speed of a particle is increased by a factor of 10, by what factor is its momentum changed, By what factor is its kinetic energy changed
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