What is the definition of a dipolar field?
What will be an ideal response?
Answer: A magnetic field with two poles: north and south.
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How much carbon dioxide was present in Earth's atmosphere 4 billion years ago?
A. about the same amount as now B. much less than now C. much more than now
During the summer, Mediterranean climates are under the influence of the subpolar low pressure system
Indicate whether the statement is true or false
On average, how many oil-releasing accidents occur worldwide each year?
A) 27 B) 175 C) 2,250 D) 5,732 E) 10,000
Which of the following best matches the description?Mining in which the top layer of soil is removed to procure the underlying deposit.
A. resources B. reserves C. active solar system D. secondary recovery E. photovoltaic cell F. geothermal energy G. acid mine drainage H. black lung disease I. underground mining J. liquefied natural gas K. surface mining L. overburden M. renewable energy sources N. nonrenewable energy sources O. passive solar system