The space that must be left between panels of roof sheathing to allow for expansion is _____
a. 1/8?
b. 1/2?
c. 3/4?
d. 1-1/4?
a
You might also like to view...
________: the number of units of foreign currency that can be exchanged for one unit of domestic currency.
Fill in the blank(s) with the appropriate word(s).
When a scenario suggests focusing on terminal traits, then students should emphasize which of the following?
a. SPI c. MLI b. leanness d. reproduction
Two students want to measure the acceleration a of a cart rolling down an inclined plane. The cart starts at rest and travels a distance s down the plane. The first student estimates the acceleration by measuring the instantaneous velocity v just as the cart has traveled s meters, and uses the formula 
The second student estimates the acceleration by measuring the time, in seconds, that the cart takes to travel s meters, and uses the formula 
. Assume that s=1 m, and that there is negligible uncertainty in s. Assume that v=3.2 ± 0.1 m/s and that t=0.63 ± 0.01 s. Assume that the measurements of v and t are independent.
a. Compute the acceleration using the method of the first student. Call this estimate 
. Find the uncertainty in .
b. Compute the acceleration using the method of the second student. Call this estimate 
. Find the uncertainty in .
c. Find the weighted average of 
and 
that has the smallest uncertainty. Find the uncertainty in this weighted average.
The most common fan used for moving air through ductwork in residential air conditioning is:
A) Forward-curved centrifugal. B) Vane axial. C) Backward-curved centrifugal. D) Propeller.