Q:

What is the relationship between Resistivity and Conductivity?

Answer

Resistivity :

Resistivity is a measure of the resistance to the flow of electrons.

Conductivity :

Conductivity is just the inverse of resistivity, σ = 1/ρ, where σ is conductivity and ρ is resistivity.

Example:

Think of a pipe and water, the bigger the pipe, the easier water can flow and thus the lower the resistance.

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Q:

Red Cross was founded by

A) J.H.Durant	B) Baden Powell
C) Tygve Lie	D) Frederic Passey

Answer & Explanation Answer: C) Tygve Lie

Explanation:

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Q:

To resolve an object in an electron microscope,

A) the wavelength of the electrons must be close to the diameter of the object	B) the wavelength of the electrons must be greater than the diameter of the object.
C) Both A & B	D) None of the above

Answer & Explanation Answer: A) the wavelength of the electrons must be close to the diameter of the object

Explanation:

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Q:

What factors contribute to global winds?

A) Coriolis Effect	B) Convection Cells
C) Uneven warming of the earth by the sun	D) All of the above

Answer & Explanation Answer: D) All of the above

Explanation:

All of the factors that contribute to global winds are

1) Uneven warming of the earth by the sun
2) Coriolis Effect
3) Convection Cells

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Q:

In a spreadsheet program how is data organized?

A) Rows and columns	B) Layers and planes
C) Lines and spaces	D) All of the above

Answer & Explanation Answer: A) Rows and columns

Explanation:

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Q:

Which of the following is the lightest computer?

A) Desktop	B) Tablet
C) Laptop	D) Ultrabook

Answer & Explanation Answer: B) Tablet

Explanation:

The lightest computer is the tablet.

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Q:

A genus can best be defined as

A) a taxon composed of one or more species and a classification level lying below family	B) a taxon composed of families
C) the most specific taxon	D) a taxon comprised of classes

Answer & Explanation Answer: A) a taxon composed of one or more species and a classification level lying below family

Explanation:

A genus can best be defined as a taxon composed of one or more species and a classification level lying below family.

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Filed Under: Biology
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Q:

Improve the bracketed part of the sentence.
(People have been long known) how important the trees are to them.

A) People have to know long	B) People had long known
C) People have long known	D) No improvement

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