If you have only been sleeping on your side, the technician may come into the room at some point and ask you to try to sleep on your back. If you never sleep on your back or cannot sleep on your back you do not need to do this in the study. Should I drink alcohol on the night of the sleep study?
To calculate the cross sectional area (CSA) of a cable, you have to use a micrometer to verify its diameter, then divide the diameter by two to get the radius (r).With the ra â¦ dius we can calculate the CSA of the cable.    CSA = pi x r2 (Applicable to solid wires only).se the formula pi x r2 (3.14 x radius x radius) to get the cross sectional area. The formula works for all measurement units whether they are inches, millimeters, centimeters or others. An alternative is to use (pi x d^2)/4. (3.14x diameter x diameter divided by 4) You do not then need to divide the original diameter.
The area of a rectangle is the length multiplied by the width or L x W. Therefore, to determine an unknown length, you simply need to divide the area by the width. For example, if the area of a rectangle is 50 and the width is 20, the equation would be 50 divided by 20 equals 2.5 -- making a very long, narrow rectangle.You can double-check your answer by plugging this value into the formula for area -- L x W -- to see if you get the area you were given.inding the Width. Find the unknown width of a rectangle by dividing the area by the length. If the area is 25 and the length is 4, the equation would be 25 divided by 4 equals 6.25.