Q:

One nanometer is

A) 10-11 m	B) 10-10 m
C) 10-8 m	D) 10-9 m

Answer & Explanation Answer: D) 10-9 m

Explanation:

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Filed Under: Physics
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3 12913

Q:

The relative density of a substance is the ____.

A) ratio of its density to the density of water	B) ratio of the density of water to its density
C) product of the density of water to its density	D) ratio of the volume of water to its volume

Answer & Explanation Answer: A) ratio of its density to the density of water

Explanation:

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1 12910

Q:

The core of an electromagnet is made of soft iron because soft iron has

A) small susceptibility and small retentivity	B) large susceptibility and small retentivity
C) large density and large retentivity	D) small density and large retentivity

Answer & Explanation Answer: B) large susceptibility and small retentivity

Explanation:

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75 12902

Q:

Rearrange the parts of the sentence in correct order.

A saint or a satyagrahi

P-freezing her acts of goodness
Q-is often put on a pedestal
R-in time

A) PQR	B) PRQ
C) QPR	D) RQP

Answer & Explanation Answer: C) QPR

Explanation:

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0 12895

Q:

Two girls ate dinner together.

After that they both ordered iced tea. One girl drank them very fast and had finished five in the time it took the other to drink just one.

The girl who drank one died while the other survived. However, all of the drinks that were served turned out to contain poison.

How did the girl who drank the most survive?

Answer

The poison was in the ice. When the girl drank the iced tea, the ice was still fully frozen. Gradually, as the ice cubes melted the poison was released into the drink.

Hence, the girl who died, drunk the tea after the ice melted. So, she was died.

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26 12891

Q:

The base of an electric iron is brightly polished mainly

A) to make it smooth and frictionless	B) to make it rust-proof
C) to reduce heat loss by radiation	D) to make it more durable

Answer & Explanation Answer: C) to reduce heat loss by radiation

Explanation:

Polished surfaces are poor radiators of heat. So loss of heat on that account is reduced and the electric iron remains hotter than otherwise.

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44 12889

Q:

If a sum of money at simple interest doubles in 6 years, it will become 4 times in

A) 15years	B) 16years
C) 17years	D) 18years

Answer & Explanation Answer: D) 18years

Explanation:

let sum =x . s.i.=x

rate =(100*x)/(x*6)=50/3%

now ,sum =x, s.i= 3x, rate =50/3%

time =(100*3x)/(x*50/3) = 18 years

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11 12888

Q:

Rearrange the parts of the sentence in correct order.

Cities have

P : intellectual stimulus

Q : always provided

R : and educational leadership

A) PQR	B) RQP
C) QPR	D) PRQ

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