A flammable vapor concentration that is too lean to ignite is _____.
a. Between the lower explosive limit and the upper explosive limit.
b. Below the lower explosive limit
c. Above the lower explosive limit
d. Above the upper explosive limit
Answer: b. Below the lower explosive limit
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In a cross-section of a glacier, the greatest flow velocities occur:a
at the surface. b. in the few tens of meters below the surface. c. in the few tens of meters above the base. d. at the base. e. in the center of the flow.
Instructions: Choose one answer from each pair of selections. Wind direction is given as the direction TOWARDS | FROM which it is blowing
Mesosphere
What will be an ideal response?
Disintegration of rock at Earth's surface may be facilitated by water ________.
A. moving through near-surface pores and fractures B. present as vapor in the atmosphere C. flowing on the surface in streams and as runoff D. frozen in a glacier that is flowing over the surface E. All of the answers are correct.