pls solve these two que fast plsss
Answers
Answer:
ok. the answers are right. i will explain, but please i beg you , mark the answer as brainliest.
Explanation:
in Q.no 12, the source is stationary with sound travelling at 330m/s, right? so, the listener is coming towards the source. You all ready know the velocity. Now think that if the person is moving opposite the direction of sound, then the velocity of the sound will double. So, if the sound source is in west, and sound moving to east, the listener moving from east to west at same velocity(330m/s) to double the velocity of sound heard.
Q.13 The sound wave is travelling, and ofcourse, the frequency is half of velocity, which is 340. so the frequency is 170. ok? Now, again implying same thing, to double speed or velocity , or frequency, we added the same frequency. it doubled the speed of the frequency.