بوابة الثانوية العامة المصرية

Give reason
1-sound velocity in sound greater than its velocity in liquid and gases
2-propagation of longtudinal wanves in solid is faster than propagation of transverse waves in solid
choose
1-increasing the displacement of wave in a medium leads to increasing in
velocity/frequency/intensity/wave length
2-if the absolute refractive index of water is 2 so the incident ray in water , it refracts in air by an angle of refraction is
60/30/45
what happen if
1- 2 tuning forks having near frequencies vibrate together and hearing sound produced
2-combination of 2 positive pulses of the same amplitudes but slightly different frequency
how can u distinguish between two similar prisms one of glass its index 1.5 and the other of diamond its index 2.5

معلش الاسئله كتير شويه بس انا عشمان فى الاساتذه الكرام .