The measure of how acidic or base a solution is

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?