With what speed would mail pass through the center of the Moon if falling in a tunnel that runs through the center

$v_f = = 7.9 \times10^3 \text{ m/s }$

layer a is the exosphere and layer b is the thermosphere.   is the answer i think but i hope this .

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!