1. A police car is driving down the street with its siren on. You are standing still on the sidewalk beside the street. If the frequency of siren Is 1500 Hz and the car is moving towards you at 15 m/s, what is the frequency you would hear from the siren?(v of sound in the air = 343 m/s)
A. 1568.60Hz
B.1321.43Hz
C. 2019.11
D.1676.92Hz
2. If the same police car in question 1 has passed you and is now moving away from you at the same speed, what is the frequency you will hear from the siren?
A.1198.67Hz
B.1390.41Hz
C.1437.15Hz
D1781.55Hz
3.A long distance runner is approaching the finish line. There is a band playing music for all the runners who are finishing. If the runner is running at 1.8m/s and the band is playing music at 991 Hz, what will be the frequency the runner hears as she approaches the band (v sound in air = 343 m/s)
A.1019.13 Hz
B.996.20Hz
C.945.71Hz
D.978.89Hz
4. Two guitars are playing together producing a beat frequency. The first guitar is playing at a frequency of 867Hz and the beat is produced every 0.4 seconds. What are some possible frequencies the other guitar could be playing to make it this beat?
A. 875 Hz or 860 Hz
B. 904 Hz or 830 Hz
C. 878 Hz or 856 Hz
D. 892 Hz or 842 Hz

20 pointsyou don't need to cite anything, just make it flow better! ! guidelines where did the early christians meet? what were their activities and responsibilities? who were their leaders? what problems did they face? my essay. it is around 200 words, the goal for 250.the church has evolved over several centuries and generations. some of these changes are for the better, such as more people being to be able to worship freely, however, some of these changes were (and are) regretfully for the worse. such an example is the overcommercialization of the church to attract worldly people. overcommercialization causes christians to lose sight of what's important and focus on what's not. it also causes christians to sin just so the can attract a different kind of crowd. but it wasn't always this way. early christians faced more persecution, but that same persecution drove them closer to god. there was really focus on spreading the wonderful news of the gospel instead of hiding behind the things of this world. they would meet in synagogues and homes to share this message too. there was really focus on spreading the wonderful at the beginning of sharing the gospel, the responsibility fell on a few people to spread the word. the disciples were these messengers, along with jesus. the disciples also had the job of finding to spread the word.

This is the largest and most populous country of the caribbean region. puerto rico dominican republic cuba haiti

Which was an important long-term result of the civil war? a a feeling of american nationalism developed. b. industrialism increased in the south. c. differences between social classes declined.