Answer:
A. It is colder at the top of a mountain
Explanation:
Density equals mass divided by volume so the ball the higher amount of mass has more density than the ball with less mass has less density. (The golf ball has more density than the ping pong ball)
The more sound waves a sound produces, the higher the pitch. Meaning if a sound has a high frequency, it will produce a high-pitched, shrill sound, while sounds with a lower frequency produce lower, deeper sounds, like bass sounds. ( i hope this helps)
Explanation:
It took for the sound to reach the 1st wall and at the same time time, the same sound took to reach the 2nd wall. Assuming that the sound travels at 343 m/s, then let be the distance of the person to the 1st wall and be the distance to the 2nd wall. So the distance between the walls X is
1 revolution = 2π radians
revs = (1/2π) · (rads) / (2π)
revs/sec = (1/2π) · (rads/sec)
RPM = (1/2π) · (rads/min) = (30/π) · (rads/sec)