Physics, 06.09.2019 21:20 Lovergirl13
Atrain sounds its horn as it approaches an intersection. the horn can just be heard at a level of 52 db by an observer 10 km away. (a) what is the average power generated by the horn? (b) what intensity level of the horn's sound is observed by someone waiting at an intersection 52 m from the train? treat the horn as a point source and neglect any absorption of sound by the air.
Answers: 2
Physics, 22.06.2019 05:30
A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?
Answers: 3
Physics, 22.06.2019 18:00
Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?
Answers: 2
Physics, 23.06.2019 06:30
If a 2 ounce coin is dropped from the top of the washington monument and has a final velocity of 300 mph (miles per hour) when it hits the ground, how much kinetic energy will it have at that time?
Answers: 2
Atrain sounds its horn as it approaches an intersection. the horn can just be heard at a level of 52...
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