The pH of root substrate can be lowered by applying ______, ______, or ______

Fill in the blank(s) with correct word


sulfur, aluminum suIfate, or iron sulfate.

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Brazil is a good example of a country that has successfully used ethanol to combat a growing energy problem

Indicate whether the statement is true or false

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A(n) __________ plastic cap on the ends of rigid metal conduit designates inch trade sizes.

a. black b. red c. blue d. None of the above

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Energy efficient systems often incorporate __________ motors to turn the system blowers and fans. These motors are very unique. They are powered by __________ power, but actually operate as __________ motors.

What will be an ideal response?

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A transmission uses a driveshaft.

Answer the following statement true (T) or false (F)

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