I have many names I come from a weird place
I cant speak but i can walk
I have water but i cant drink it
what am i?

Aka impossible riddle

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

Write the correct abbreviation for each metric unit

What is the final velocity of the initial velocity of 25 and -50?