What maintenance does an electronic air cleaner require?
A) Periodically replacing the ionized plates
B) Annual replacement of the electrostatic precipitation unit
C) Periodically cleaning the ionized plates
D) Very little maintenance is required because the plates burn up the contaminants.
C
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The lengths of two components will be measured several times. The uncertainty in each measurement of the length of the first component is src="https://sciemce.com/media/4/bb4ad71c08f6dc97xy.jpg" class="w-image" />.
a. Find the uncertainty in the total length if the first component is measured 4 times and the second component is measured 12 times.
b. Find the uncertainty in the total length in terms of n if the first component is measured n times and the second component is measured 16–n times.
c. Determine the best way to allocate 16 measurements between the components by determining the value of n that minimizes the uncertainty.
=0.02 cm, and the uncertainty in each measurement of the length of the second component is 
=0.08 cm. Let 
denote the average of the measurements of the first component, and let 
denote the average of the measurements of the second component. The total length of the two components will be estimated with the quantity
Describe how Ohm’s Law can be applied to insulation resistance-measuring instruments.
What will be an ideal response?
The production cost for direct mail advertising is much lower than for newspaper ads
Indicate whether the statement is true or false
Which of the following features is NOT used to distinguish sheep from goats?
A. Less odor in males B. Absence of a beard C. Glands in all four feet D. Hide color