Dave decides that he wants to land 25 meters (horizontally) from the diving board in 3 seconds. How fast should he run off the board in order to land this distance away?
A.
2.2 m/s
B.
3.1 m/s
C.
8.3 m/s
D.
75 m/s

Gas will most likely  fill the container 

//(b) both involve the use of levers;

Over 9

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.