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Q:

Propagation of sound can be visualised as propagation of ____________ variations in the medium

A) elasticity B) viscosity
C) density D) porosity
 
Answer & Explanation Answer: C) density

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Q:

An anemometer measures which of the following ?

A) Speed of light B) Speed of wind
C) Speed of water current D) Speed of satellites
 
Answer & Explanation Answer: B) Speed of wind

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Q:

Which one of the following takes place during a nuclear fusion?

A) a heavy nucleus bombarded by neutrons breaks up B) a heavy nucleus breaks up spontaneously
C) two light nuclei combine to form a heavy nucleus D) a light nucleus breaks up spontaneously
 
Answer & Explanation Answer: C) two light nuclei combine to form a heavy nucleus

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Q:

At boiling point of liquids , its

A) Temperature increases B) Atmospheric pressure increases
C) Temperature remains constant D) Vapour pressure decreases
 
Answer & Explanation Answer: C) Temperature remains constant

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Q:

Which glass is used to make spectacles?

A) Crook's glass B) Potash glass
C) Jena glass D) Soda glass
 
Answer & Explanation Answer: A) Crook's glass

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Q:

Sextant is an instrument used in which of the following ?

A) Gynaecology B) Navigation
C) Birth control D) Medical treatment
 
Answer & Explanation Answer: B) Navigation

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Q:

To hear a distinct echo the time interval between the original sound and the reflected sound must be at least

A) 0.2 second B) 1 second
C) 0.1 second D) 2 seconds
 
Answer & Explanation Answer: C) 0.1 second

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Q:

Which of the following device is used to measure humidity?

A) Hydrometer B) Hygrometer
C) Psycho Meter D) Anemometer
 
Answer & Explanation Answer: B) Hygrometer

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