Describe a potential method that could be used to reduce cloud-to-ground lightning discharges.?
What will be the ideal response?
ANSWER: One technique that has shown some success in suppressing lightning involves seeding a cumulonimbus cloud with hair-thin pieces of aluminum about 10 centimeters long. The idea is that these pieces of metal will produce many tiny sparks, or corona discharges, and prevent the electrical potential in the cloud from building to a point where lightning occurs. While the results of this experiment are inconclusive, many forestry specialists point out that nature itself may use a similar mechanism to prevent excessive lightning damage. The long, pointed needles of pine trees may act as tiny lightning rods, diffusing the concentration of electric charges and preventing massive lightning strokes.?
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Which of the following is not one of the soil forming factors?
A) climate B) topography C) biological activity D) time E) season of year
When the environmental lapse rate exceeds both the dry adiabatic lapse rate and the wet adiabatic lapse rate of a parcel of air, that air parcel contains:
A) absolutely stable air. B) conditionally unstable air. C) absolutely unstable air. D) air that cannot reach the lifting condensation level.
Deltas are most common ____
A) ?on low-energy shores of enclosed seas B) ?along convergent zones of the western margins of North America C) ?near the west coast of South America D) ?along the passive margin of the Atlantic coast of North America
What is a moment magnitude based on?
A. Amount of energy released B. Amount of ground shaking C. Changes in the chemical composition of rocks D. Human observations