Physics, 28.06.2019 17:30 kingdede8811
Afire truck with sirens on, is driving north on a street. a car is driving south on the same street and sees the fire truck ahead. the car is moving at a speed of 15.7 m/s and the fire truck is moving at a speed of 31.8 m/s. the siren of the fire truck produces a 965 hz sound. the speed of sound in air is 343 m/s. what frequency does the person in the car hear? if the sound from the siren is produced at 45.2 w, what is the reading on the decibel meter held by the person when the car is 36.8 m away from the fire truck? assume the sound from the horn is emitted uniformly in all directions (a = 4 pi r^2). what is the farthest distance from the fire truck that a person could hear the siren?
Answers: 3
Physics, 21.06.2019 18:10
Amass has an acceleration of 10- 2t. what is its velocity and displacement if it started at x- 4m and the initial velocity was 8m/s? at what time does it have 0 velocity? graph all graphs.
Answers: 2
Physics, 21.06.2019 19:30
Two identical 82 mg dust particles very far apart (pee 0) are moving directly toward each other at a speed of 3698 m/s. the charge on each is-719 ? c. determine how close they will get to each other. let k = 9x109 n-m2/c2 & ignore gravity.
Answers: 1
Physics, 21.06.2019 22:30
The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage
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Physics, 22.06.2019 23:30
An electric power distributor charges residential customers $0.10 per kilowatt-hour (kwh). the company advertises that "green power" is available in 150 kwh blocks for an additional $4 per month. (green power is generated from solar, wind power, and methane sources.) if a certain customer uses an average of 391 kwh per month and commits to one monthly 150 kwh block of green power, what is her annual power bill
Answers: 1
Afire truck with sirens on, is driving north on a street. a car is driving south on the same street...
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