What methods can be used to stabilize a hillside? What will be an ideal response?
Methods include: installing subsurface drainage, diversion of surface waters, reducing the slope by
cut-and-fill or benching, constructing retaining walls, and planting vegetation.
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Steel wool wetted with vinegar is stuffed into a narrow mouth round glass bottle. A rubber balloon is then sealed over the mouth of the bottle. After several hours, the balloon inflates into the bottle in an inverted manner. What happened?
A. False! The balloon inflates above the mouth of the bottle because the reaction between the vinegar and steel wool produces a gas which is forced upward because of increased pressure inside the sealed bottle. B. The vinegar reacts with the steel wool by absorbing oxygen within the bottle thus decreasing the pressure. The greater outside pressure causes the balloon to inflate in an inverted manner. C. Vinegar fumes are diamagnetic, and as they accumulate above the liquid, the steel wool is attracted thus inflating the balloon into the mouth of the bottle in an inverted manner. D. The caustic vinegar fumes get past the steel wool and deteriorate the balloon, which begins to sag into the bottle and inflate it in an inverted manner.
If the pH of a solution is 10, what is the hydroxide ion concentration?
A) 1 × 10-4 M B) 4 M C) 14 M D) -14 M E) -1 × 1014 M
A horse is an example of a/an
a. vertebrate. d. invertebrate. b. brachiopod. e. cynodont. c. archaeocyathid.
Research the practicality of using the atmosphere, oceans, and ice sheets as
sources of freshwater. Are any of these reservoirs currently in use? If so, by whom? If not, why do you think they are not used? Oceans What will be an ideal response?