The length of a rod is to be measured by a process whose uncertainty is 3 mm. Several independent measurements will be taken, and the average of these measurements will be used to estimate the length of the rod. How many measurements must be made so that the uncertainty in the average will be 1 mm?
What will be an ideal response?
Let n be the necessary number of measurements. Then 
. Solving for n yields n = 9.
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Arch brick can be laid in several positions for semicircular arches.
Answer the following statement true (T) or false (F)
? Identify and state the historical significance of the New Jersey Plan.
What will be an ideal response?
A push-button switch is used to input data to a register. The output of the register is erratic. Which of the following could be the cause of the problem?
A) The power supply is probably noisy. B) The register IC is intermittent and failure is imminent. C) The socket contacts on the register IC are corroded. D) The switch contacts are bouncing.
?What are the primary factors that determinethe amount of air that can exist in a solution of water?
A. ?temperature and pressure B. ?temperature and volume C. ?pressure and type of dissolved gas D. ?type of fluid and type of dissolved gas