An explosion occurs at the end of a pier. the sound reaches the other end of the pier by traveling through three media: air, fresh water, and a slender metal handrail. the speeds of sound in air, water, and the handrail are 339, 1480, and 5060 m/s, respectively. the sound travels a distance of 141 m in each medium.
(a) after the first sound arrives, how much later does the second sound arrive?
(b) after the first sound arrives, how much later does the third sound arrive?
Answers: 2
Physics, 22.06.2019 00:00, tsupreme
1134567 a jet with mass m = 1.1 Δβ 105 kg jet accelerates down the runway for takeoff at 2 m/s2. 1) what is the net horizontal force on the airplane as it accelerates for takeoff? 2.2*10^5 n your submissions: 2.2*10^5 computed value: 220000submitted: saturday, january 26 at 2: 41 pm feedback: correct! 2) what is the net vertical force on the airplane as it accelerates for takeoff? 0 n your submissions: 0 computed value: 0submitted: saturday, january 26 at 2: 41 pm feedback: correct! 3) once off the ground, the plane climbs upward for 20 seconds. during this time, the vertical speed increases from zero to 21 m/s, while the horizontal speed increases from 80 m/s to 95 m/s. what is the net horizontal force on the airplane as it climbs upward? n 4) what is the net vertical force on the airplane as it climbs upward? n 5) after reaching cruising altitude, the plane levels off, keeping the horizontal speed constant, but smoothly reducing the vertical speed to zero, in 13 seconds. what is the net horizontal force on the airplane as it levels off? n 6) what is the net vertical force on the airplane as it levels off?
Answers: 1
Physics, 22.06.2019 13:50, Geo777
Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination. at the turning point, how far is the second student from the destination?
Answers: 3
Physics, 22.06.2019 15:10, deidaraXneji
In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_
Answers: 3
An explosion occurs at the end of a pier. the sound reaches the other end of the pier by traveling t...
History, 13.10.2020 19:01
Mathematics, 13.10.2020 19:01
Social Studies, 13.10.2020 19:01
Mathematics, 13.10.2020 19:01
Mathematics, 13.10.2020 19:01
Business, 13.10.2020 19:01
English, 13.10.2020 19:01