10. From the top of a tower 100 m in height a ball is dropped and at the same instant another ball
is projecred vertically upwards from the ground
so that it just reaches the top of tower. At what
height do the two balls pass one another?

The correct option is this: the sound waves from the two trombones have slightly different frequencies.from the question given above, we are told that the loudness of the sounds were increasing and decreasing, this is because the frequencies of the two sounds are different. the means that the number of waves that pass a fixed point in a given amount of time differ for both sounds.

Answernewton's second law,says that when a contant force acts on a massive body, it causes it to accelerate

Answerglobal wind patterns plz check this one, i think its right