a S of 1.6x1oWat distance of 12m, a) what s the power b) what is the...
An outside loudspeaker (considered a small source) emits sound waves with a power output of 111 w (a) Find the intensity 10.7 m from the source W/m2 (b) Find the intensity level in decibels at that distance. dB (c) At what distance would you experience the sound at the threshold of pain, 120 dB? Need Help? Read 11. -/2 points SerCP10 14 P023 My No A commuter train passes a passenger platform at a constant speed of 42.1 m/s. The...
A 92-kg water skier floating in a lake is pulled from the rest to the speed of 12m/s in a distance of 25m. What is the force exerted on the skier, assuming his accelaration is constant?
At a distance of 73 cm, a mosquito can barely be heard at a sound level of 4.1 dB. What is the intensity of this sound? If the same mosquito were flying at a distance of 1.3 cm from your ear, what would be the intensity of its sound? If there were two mosquitoes 1.3 cm from your ear, how loud would they sound? (dB). How loud would the mosquito sound at 1.3 cm from your ear (dB)? Hint: sound...
A speaker at an open-air concert emits 600 W of sound power, radiated equally in all directions. A.)What is the intensity of the sound 4.50 m from of the speaker? B.) What sound intensity level would you experience there if you did not have any protection for your ears? c.)Earplugs you can buy in the drugstore have a noise reduction rating of 23 decibels. If you are wearing those earplugs, but your friend Phil is not, how far from the...
8. The discharge flowing in a trapezoidal canal is equal to 30m3/s and a velocity of.12m/s. (a) What would be the width of the canal for a most efficient section? (b) If the width of the canal is 1.5 of its depth, compute the width of the canal if the sides are sloping at an angle of 50 degrees. (c) If the sides are sloping at an angle of 54 degrees, compute the width of the base for a minimum...
Question: Two sources, S, and we spaced a distance 21. apart wher 1 .17 m Figure 1). They emit sound waves isotropically and in phase, each with a power P-41.2 W. A wall is a distance Laway from the sources. There is a hole in the wall halfway between the two sources with a cross-sectional area A = 27.0 cm and out of 1.00 S2 Figure 1: Schematic of two sound sources, S, and S. spaced a distance 21. Apart,...
An outside loudspeaker (considered a small source) emits sound waves with a power output of 111 W (a) Find the intensity 10.7 m from the source. 0.76 Your response differs from the correct answer by more than 100%, w/m? (b) Find the intensity level in decibels at that distance. 118.8 Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation Cary out all inter to...
A toy is thrown vertically upward with a speed of 12m/s from the edge of a cliff 75m high. How much later does it reach the bottom of the cliff? Whats its speed just before hitting the ground? What total distance did it travel?
A source emits sound uniformly in all directions. There are no reflections of the sound. At a distance of 12 m from the source, the intensity of the sound is 4.3 ×10-3 W/m2. What is the total sound power P emitted by the source?
4.)The speed of sound in air is approximately 340m/s. a) What is the speed of sound in feet per second (1100ft/s) b) What is the speed of sound in miles per hour. (760mi/hr) c) What is the wavelength of note with frequency of 28Hz? (12m) d) What is the wavelength of a note with frequency of 4200Hz? (8.1x10 m) exa 10" 1015 Factor Name Symbol 10% yotta Y 10% zettaz E peta P 10 tera T 10 giga G 10...