Which of the following is caused by constructive interference? A standing wave B dispersion с reflection D diffraction

Two progressive waves y1=Asin(2πλx−ωt)y1=Asin⁡(2πλx−ωt) and y2=Asin(2πλx−ωt−π2)y2=Asin⁡(2πλx−ωt−π2) travel in the same direction. Calculate the velocity of the wave produced as a result of interference of these two waves. Take A=5A=5 cm, λ=λ=6.9 m and ω=ω=12.3 rad/s (radian per second). Give your answer in SI units.

2. Make a matrix of the general properties of the waves showing the following parameters.

Answer to part A: 101 Hz I need help with parts: B, C, D

Mjc5NTA2NTk3NjEz (b) 0.8 sec; 14 m/s (c) 0.4 sec; 7 m/s (d)0.8 sec; 3.5 m/s 4) Two identical sinusoidal waves travel in the same direction at the same speed with an amplitude A. The phase difference between the two waves is o = 69.8°. The amplitude of the resultant wave, Aresultant» is increased with respect to the amplitude of the individual waves, A, by: (a) 18% (b) 64% (c) 82% (d) 164% 5) Two identical sinusoidal waves with frequency of 20 Hz travel in the same đirection at the same speen The two waves originate from the same point but with a time difference At. The amplitude of th AV3. The minimum possible time difference between the starting moments resultant wave is Ares the two waves is, At =: (a) 1/120 sec (b)0477 sec (c) 1/80 sec (d)0.716 sec rleueths of 2.5 m travel in the same direction with the Ih difference. Wave-1 tra