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Q:

Why is secondary storage needed?

A) no need of power supply B) large storage capacity
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

Secondary storage therefore needed because it is non-volatile, meaning it retains its contents without the need for a power supply. It also has the large storage capacity needed to store the operating system and all the programs and files needed by a modern computer system.

secondary_storage1532340725.jpg image

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Q:

2 is what percent of 50?

A) 3 B) 4
C) 2.5 D) 5
 
Answer & Explanation Answer: B) 4

Explanation:

Let p% of 50 is 2

=> p x 50/100 = 2

=> p = 4%

 

Hence, 2 is 4 percent of 50.

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Q:

Father of Email

Email1498884677.jpg image

A) A B) B
C) C D) D
 
Answer & Explanation Answer: B) B

Explanation:

Ray Tomilson

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Q:

The law of demand states that other things equal

A) as the price increases, the quantity demanded will decrease. B) as the price increases, the quantity demanded will increase.
C) as the price decreases, the demand curve will shift to the right. D) as the price increases, the demand will decrease.
 
Answer & Explanation Answer: A) as the price increases, the quantity demanded will decrease.

Explanation:
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Q:

In a projectile motion, a large angle with the horizontal produces ______.

A) flat trajectory B) curve trajectory
C) straight trajectory D) high trajectory
 
Answer & Explanation Answer: D) high trajectory

Explanation:
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Q:

Assessing opportunity cost involves

A) choosing consequences over profits B) maximizing profit and loss
C) making choices and dealing with consequences D) Both B & C
 
Answer & Explanation Answer: C) making choices and dealing with consequences

Explanation:

Assessing opportunity cost involves making choices and dealing with consequences.

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Q:

Magnetism in materials is due to

A) Displacement of electrons B) Circular motion of electrons
C) Charges of neutrons D) All of the above
 
Answer & Explanation Answer: B) Circular motion of electrons

Explanation:

Magnetism in materials is due to circular motion of electrons.

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Q:

Who began public health and sanitation systems?

A) Mexicans B) Egyptians
C) Romans D) Chinese
 
Answer & Explanation Answer: C) Romans

Explanation:

Romans (753 BC - AD 410) began public health and sanitation systems.

 

Romans established the first public health and sanitation systems by building sewers and aqueducts.

Romans1531898190.jpg image

They also treated diseases with diet, exercise and meditation.

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