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Q:

A lemon kept in water in a glass tumbler appears to be bigger than its actual size when viewed from the sides. This is because of

A) reflection of light B) internal reflection of light
C) refraction of light D) diffraction of light
 
Answer & Explanation Answer: C) refraction of light

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Q:

A body is initially moving with a velocity of 5 m/s. It undergoes an acceleration of 2 m/s2 for 4 seconds. Find the displacement (in m) of this body in these 4seconds.

A) 4 B) 72
C) 36 D) 8
 
Answer & Explanation Answer: C) 36

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Q:

Warm air is ______.

A) heavier than cold air hence warm air rises up B) lighter than cold air hence warm air moves down
C) lighter than cold air hence warm air rises up D) heavier than cold air hence warm air moves down
 
Answer & Explanation Answer: C) lighter than cold air hence warm air rises up

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Q:

Through which does light travel best?

A) water B) air
C) vacuum D) none
 
Answer & Explanation Answer: C) vacuum

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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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Q:

Instrument for measuring low temperatures is called

A) Diagometer B) Cryometer
C) Chromatoptometer D) Cymometer
 
Answer & Explanation Answer: D) Cymometer

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Q:

Sound can not travel in which of the following medium?

A) Solid B) Liquid
C) Gas D) Vacuum
 
Answer & Explanation Answer: D) Vacuum

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Q:

The pitch of a sound depends on its ____.

A) frequency B) wavelength
C) amplitude D) timbre
 
Answer & Explanation Answer: A) frequency

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