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Q:

The reactivity of an atom arises from

A) the existence of unpaired electrons in the valence shell B) the potential energy of the valence shell
C) the average distance of the outermost electron shell from the nucleus D) the sum of the potential energies of all the electron shells
 
Answer & Explanation Answer: A) the existence of unpaired electrons in the valence shell

Explanation:

The reactivity of an atom arises from the existence of unpaired electrons in the valence shell.

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Filed Under: Chemistry
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Q:

Which statement correctly describes the role of chance in evolution?

A) An allele that increases evolutionary fitness cannot be lost from a population by chance events. B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA
C) Evolutionary change proceeds by an accumulation of changes that occur by chance. D) None of the above
 
Answer & Explanation Answer: B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA

Explanation:
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Filed Under: Biology
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Q:

What is virtual path?

Answer

Along any transmission path from a given source to a given destination, a group of virtual circuits can be grouped together into what is called path.

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Subject: Networking
Job Role: Network Engineer

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Q:

Which statement regarding the era of Reconstruction is FALSE?

A) the 14th Amendment made African-Americans citizens of the U.S. B) the 13th Amendment outlawed slavery in all American states
C) federal law was changed to abolish slavery in states where it still existed D) state laws and customs upheld the constitutional amendments
 
Answer & Explanation Answer: D) state laws and customs upheld the constitutional amendments

Explanation:
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Filed Under: Indian History
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Q:

Gamma rays are emanations that have

A) charge but no mass B) neither mass nor charge
C) both mass and charge D) mass but no charge
 
Answer & Explanation Answer: B) neither mass nor charge

Explanation:

A gamma ray or gamma radiation, is a penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves and so imparts the highest photon energy.

Gamma rays are emanations that have neither mass nor charge.

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Filed Under: Physics
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Q:

The resolution of a printer is measured in

A) DPI B) Megabits
C) Hertz D) Inches
 
Answer & Explanation Answer: A) DPI

Explanation:

Dots per inch (DPI, or dpi) is a measure of spatial printing or video or image scanner dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch (2.54 cm).

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Filed Under: Computer
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Q:

Press freedom day is celebrated on

A) May 2 B) May 3
C) May 4 D) None of these
 
Answer & Explanation Answer: B) May 3

Explanation:
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Filed Under: Important Days and Years

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Q:

Stress is a factor that contributes to heart disease risk.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

True, Stress is a factor that contributes to heart disease risk.


More factors that contributes to heart disease risk are blood pressure, cholesterol, smoking, physical inactivity and overeating.

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Subject: Biology
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