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Q:

Which insect sits on uncovered food?

A) bees B) flies
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

Both flies and bees can sit on the uncovered food and contaminate the food.

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Q:

Nepal Government announces public holidays during Nepalese President's visit to _____

A) India B) China
C) Japan D) Russia
 
Answer & Explanation Answer: A) India

Explanation:

Nepalese President Bidya Devi Bhandari is arriving in New Delhi on a five-day visit to India. This will be Bhandari's first foreign trip after assuming the office in October 2015, following the promulgation of the new Constitution in Nepal.

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Q:

Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K? 

A) K1k2/k1+k2 B) 2k1k2/k1+k2
C) K1+k2/k1k2 D) None
 
Answer & Explanation Answer: B) 2k1k2/k1+k2

Explanation:

We know that,

 

The equivalent K =  L1 + L2L1K1+L2K2

 

where L1 & L2 are plate1 & Plate2 thicknesses, K1 & K2 are coefficient thermal conductivity of plate1 & Plate2 respectively.

 

But here L1 = L2 = L (say)

 

Then K = L+L/(L/K1 + L/K2)  =  2K1K2K1+K2

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Filed Under: Physics
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Q:

Decibel is the unit of

A) speed of light B) intensity of sound
C) intensity of heat D) None of these
 
Answer & Explanation Answer: B) intensity of sound

Explanation:
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Filed Under: Physics

15 7184
Q:

What symbol is used to enter number as text?

A) = B) "
C) ' D) _
 
Answer & Explanation Answer: C) '

Explanation:

Apostrophe(‘) symbol is used before a number to make it a text or label.

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Q:

India’s largest ground-based optical telescope has been installed in which state?

 

A) Uttar Pradesh B) Gujarat
C) Goa D) Uttarakhand
 
Answer & Explanation Answer: D) Uttarakhand

Explanation:
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Q:

In a certain city, 5% of all the persons in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?

Answer

  Zero. You are selecting names from the list, so they are all listed.

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Subject: Math Puzzles

6 7179
Q:

An object at rest may have

A) Momentum B) Potential energy
C) Velocity D) Kinetic energy
 
Answer & Explanation Answer: B) Potential energy

Explanation:

An object at rest may have Potential energy.

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