I just need correct Answers ? Two pulses traveling on the same string are descri

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I just need correct Answers ?

Two pulses traveling on the same string are described by where a = 7.3 m-1 and b = 3.9 s-1. At what time do the two cancel? Answer in units of s At what point do the two waves always cancel? Answer in units of m The waves from a radio station can reach a home receiver by two paths. One is a straight- line path from transmitter to home, a distance of 25 km. The second path is by reflection from the ionosphere layer of ionized air molecules near the top of the atmosphere). Assume this reflection takes place at a point midway between receiver and transmitter and that there are no phase changes on reflection. If the wavelength broadcast by the radio station is 403 in, find the minimum height h of the ionospheric layer that produces de¬structive interference between the direct and reflected beams. Answer in units of km

Explanation / Answer

9. 0.769s

10. 0.411m

11. 106.27 km

12.0.51m

13. 0.19m

18. 1.532A

19. 7849.86HZ

20.15699.71HZ

23 1.496m

24 2

25. 1

26.0.4051 s

27. 0.972m

28. 0.775s

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