Briefly describe how acid rain is formed
What will be an ideal response?
ANS:
Most smoke and exhaust from homes, factories, or motor vehicles contain harmful sulfur compounds unless special equipment is used to remove them. Once these invisible gases are in the air, they combine with moisture to form sulfuric acid, which falls as acid rain.
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IDENTIFY TEST PROCESS SYMBOLS AND DIAGRAMS
Twenty-nine pipe flanges are flame cut from a plate that is 16.25” wide. Assuming there is no waste, how much plate do the flanges require, in inches?
What will be an ideal response?
Concrete joints can be grouped into _____
a. two classes b. three classes c. four classes d. five classes
Dry friction depends on the force that presses two forces together and on
_________________ . A. the size of the surface area of the two surfaces B. the speed at which the two surfaces areas move past each other C. the type of materials of which the two surfaces are made D. All of the above