Natural electric field of the Earth/Quiz

< Natural electric field of the Earth

The lecture on the natural electric field of the Earth is part of a series on the geophysics of the Earth.

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Quiz

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1. True or False, The natural electric field of the Earth starts at its surface and extends inward to the core.

TRUE
FALSE

2. True or False, The natural electric field of the Earth includes the electrosphere.

TRUE
FALSE

3. True or False, The natural electric field of the Earth is caused in part by the solar wind.

TRUE
FALSE

4. True or False, The natural electric field of the Earth has a negative charge at the surface of the Earth and a positive charge at the ionosphere.

TRUE
FALSE

5. True or False, The natural electric field of the Earth has a gradient of the about 200 volts/meter just above the Earth's surface.

TRUE
FALSE

6. True or False, The natural electric field of the Earth has a gradient of the about 200 volts/meter just below the Earth's surface.

TRUE
FALSE

7. True or False, The natural electric field of the Earth just below the ionosphere reduces to close to a zero gradient.

TRUE
FALSE

8. True or False, An approximately 5,000 kg vehicle would need at least 3,300 Coulombs of charge (probably negative) stored onboard to be repelled by the Earth's surface.

TRUE
FALSE

9. True or False, To rise above the Earth's surface a 5,000 kg vehicle with 3,300 Coulombs aboard would have to dissipate charge.

TRUE
FALSE

10. True or False, A 5,000 kg vehicle with say 4,000 Coulombs of negative charge aboard would probably have to dissipate charge to land on the Earth's surface.

TRUE
FALSE

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Research

Hypothesis:

  1. Charge can be acquire or dissipated into the atmosphere at sufficient speeds to allow landing and take-off without collisional effects of a repellor vehicle.

Control groups

This is an image of a Lewis rat. Credit: Charles River Laboratories.

The findings demonstrate a statistically systematic change from the status quo or the control group.

“In the design of experiments, treatments [or special properties or characteristics] are applied to [or observed in] experimental units in the treatment group(s).[1] In comparative experiments, members of the complementary group, the control group, receive either no treatment or a standard treatment.[2]"[3]

Proof of concept

Def. a “short and/or incomplete realization of a certain method or idea to demonstrate its feasibility"[4] is called a proof of concept.

Def. evidence that demonstrates that a concept is possible is called proof of concept.

The proof-of-concept structure consists of

  1. background,
  2. procedures,
  3. findings, and
  4. interpretation.[5]

See also

References

  1. ↑ Klaus Hinkelmann, Oscar Kempthorne (2008). Design and Analysis of Experiments, Volume I: Introduction to Experimental Design (2nd ed.). Wiley. ISBN 978-0-471-72756-9. http://books.google.com/?id=T3wWj2kVYZgC&printsec=frontcover.
  2. ↑ R. A. Bailey (2008). Design of comparative experiments. Cambridge University Press. ISBN 978-0-521-68357-9. http://www.cambridge.org/uk/catalogue/catalogue.asp?isbn=9780521683579.
  3. ↑ "Treatment and control groups, In: Wikipedia". San Francisco, California: Wikimedia Foundation, Inc. May 18, 2012. Retrieved 2012-05-31.
  4. ↑ "proof of concept, In: Wiktionary". San Francisco, California: Wikimedia Foundation, Inc. November 10, 2012. Retrieved 2013-01-13.
  5. ↑ Ginger Lehrman and Ian B Hogue, Sarah Palmer, Cheryl Jennings, Celsa A Spina, Ann Wiegand, Alan L Landay, Robert W Coombs, Douglas D Richman, John W Mellors, John M Coffin, Ronald J Bosch, David M Margolis (August 13, 2005). "Depletion of latent HIV-1 infection in vivo: a proof-of-concept study". Lancet 366 (9485): 549-55. doi:10.1016/S0140-6736(05)67098-5. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1894952/. Retrieved 2012-05-09.

External links

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Educational level: this is a research resource.
Resource type: this resource is a quiz.
Subject classification: this is an astronomy resource.
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