Neither. The A has a schwa sound (ess, iss) while the U has a caret U sound (uhr).
You measure the distance from the surface that mounts to the block to the hub where the pulley mounts. Short=5 5/8" Long=7"
An acre isn't a unit of length, it is a unit of area. You can have a surface - for example a rectangle - as long or as short as you like, provided the product of the two sides is enough to get a surface of 15 acres, in this case.
On the surface
the formula for calculating the surface area of an oval is A = Pi * a * b where a & b are the semimajor(half the long) and semiminor(half the short) axes
Surface Tension - short story - was created in 1952.
A = Pi * a * b where a & b are the semimajor(half the long) and semiminor(half the short) axes
long
On the surface
Short hairlike projections on a cell surface are called cilia. Cilia are specialized structures that act like tiny antennas, helping cells to sense their surroundings and move substances across the cell surface.
Loser long or short vowel
The I has a short I sound, as in click or trick.
The letter "o" in "robot" is a short vowel sound.