Which of the following comparisons of the three different classes of salt-affected soils is correct?
A) Sodic soils generally have the highest EC levels.
B) The pH of saline soils is generally above 8.5.
C) Saline soils are generally higher in soluble salts than saline-sodic soils.
D) Sodic soils are commonly formed by leaching saline-sodic soils.
E) Sodic soils generally have the lowest pH.
D
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Use this pencil for sketching.
a. 2 b. HB c. 4H d. none of the above
The United States has treaties set up with Canada and Mexico to protect migratory birds
a. True b. False Indicate whether the statement is true or false
Most indoor fluorescent light fixtures contain two or three 40-watt bulbs each. If a classroom has 15 fluorescent light fixtures, each with three 40-watt bulbs, how much does it cost to leave the lights on for a two-hour class? Assume the electric company charges approximately 10 cents per kilowatt-hour.
What will be an ideal response?
The subsequent problems deal with the figure below. Assume all outputs are low to begin with unless indicated otherwise.
If buttons B1 and B2 are both being held down, what does the following PicBasic code do?If (PORTB.1 == 1) ThenHigh PORTB.2ElseLow PORTB.2EndIf
A. turns off LED L1 (if it was on to begin with) B. turns on LED L1 (if it was off to begin with)