Answer:
6the first is a one block and the two are u to be the best in freefire with the best and best name to get
Explanation:
the first time he was a boy and a girl in the 6AM he is a girl who has 6666th grade 6inches
The change in pitch of a train's horn as it passes while you are standing still can be explained by the Doppler effect. The correct option among all the options given in the question is option "A". When the sound source from the horn of the train comes closer, the sound seems to come closer each time a sound wave gets emitted. So it comes closer to us in a bunched form. The reverse happens when the train has just passed with each emitted sound going further and further away. The frequency of the sound seems to get lower as the train moves further away.
Helium lithium and calcium
Answer:
It would be a square and 2d
Explanation:
