Questions

Q:

Leeuwenhoek discovered the free living cells for the first time in ______.

A) pond water B) sea water
C) soil D) human body
 
Answer & Explanation Answer: A) pond water

Explanation:
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Q:

Which  one  of  the following  is  the  value  of one nanometer?

A) 10-7 cm B) 10-6 cm
C) 10-4  cm D) 10-3  cm
 
Answer & Explanation Answer: A) 10-7 cm

Explanation:

1 nanometer (nm) of length

Equals: 0.00000010 centimetres (cm) in length.

This is equal to 10^-7 cm.

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Q:

Weight (W) of a body can be given by the formula

A) W = mv B) W = mf
C) W = ms D) W = mg
 
Answer & Explanation Answer: D) W = mg

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Q:

A force of 200 N displaces a body by 4 m, calculate the work done (in J).

A) 40 B) 500
C) 80 D) 800
 
Answer & Explanation Answer: D) 800

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Q:

What is the unit of relative density?

A) kg/m B) kg/m2
C) kg/m3 D) It has no unit
 
Answer & Explanation Answer: D) It has no unit

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Q:

________________ refers to the superposing of two or more coherent waves to produce regions of maxima and minima in space, according to the principle of superposition.

A) Interference B) Rectification
C) Intensity D) Diffraction
 
Answer & Explanation Answer: A) Interference

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Q:

Rodentia Sciurus is the scientific name of

A) Rat B) Platypus
C) Squirrel D) Beaver
 
Answer & Explanation Answer: C) Squirrel

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Q:

Which is the largest and deepest ocean?

A) Arctic B) Pacific
C) Atlantic D) Indian
 
Answer & Explanation Answer: B) Pacific

Explanation:
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