Physics, 28.09.2019 20:10 btsheygirl
An alert physics student stands beside the tracks as a train rolls slowly past. he notes that the frequency of the train whistle is 496 hz when the train is approaching him and 478 hz when the train is receding from him. using these frequencies, he calculates the speed of the train. what value does he find? (assume the speed of sound in air is 343 m/s.)
Answers: 1
Physics, 22.06.2019 18:00
Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly
Answers: 2
Physics, 23.06.2019 00:20
An object with a mass of 1.5 kg changes its velocity from + 15 m/s to +22 m/s during a time interval of 3.5 seconds. what impulse was delivered to the objects?
Answers: 2
Physics, 23.06.2019 02:30
Aswimmer is determined to cross a river that flows due south with a strong current. initially, the swimmer is on the west bank desiring to reach a camp directly across the river on the opposite bank. in which direction shoud the swimmer head? a. the swimmer should swim southeast. b. the swimmer should swim south. c. the swimmer shuold swim northeast. d. the swimmer should swim due north. e. the swimmer should swim due east.
Answers: 2
Physics, 23.06.2019 05:30
Which if these is an etiquette rule? (american football) question 10 options: a. debating with the ref over a call b. not communicating with your team c. post-game handshake d. taunting
Answers: 1
An alert physics student stands beside the tracks as a train rolls slowly past. he notes that the fr...
SAT, 25.11.2020 19:50
Biology, 25.11.2020 19:50
Chemistry, 25.11.2020 19:50
English, 25.11.2020 19:50
Business, 25.11.2020 19:50
Mathematics, 25.11.2020 19:50
English, 25.11.2020 19:50
English, 25.11.2020 19:50
Mathematics, 25.11.2020 19:50
History, 25.11.2020 19:50