Slope is also known as unit ____.
A. rise
B. pitch
C. span
D. overhang
Answer: A
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____ are fast acting and are often used to measure the speed of rotating objects.
a. Proximity detectors b. Ultrasonic detectors c. Hall effect sensors d. Proximity sensors
Plants not only purify air and _____ but also help create a comfortable place for living, working and shopping
A) reduce nitrogen? B) provide atmosphere? C) produce oxygen D) increase carbon dioxide
In a study of the effect of cooling rate on the hardness of welded joints, 50 welds cooled at a rate of 10°C/s had an average Rockwell (B) hardness of 91.1 and a standard deviation of 6.23, and 40 welds cooled at a rate of 30°C/s had an average hardness of 90.7 and a standard deviation of 4.34.
a. Find a 95% confidence interval for the difference in hardness between welds cooled at the different rates. b. Someone says that the cooling rate has no effect on the hardness. Do these data contradict this claim? Explain.
A thickened object is obtained by simply changing its thickness property. This type of object, however, does not hide the lines of the objects located behind it when the HIDE command is invoked
Indicate whether the statement is true or false