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Q:

Which of the following is an example of thermoplastics?

A) Bakelite B) Melamine
C) PVC D) No option is correct
 
Answer & Explanation Answer: C) PVC

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Q:

Borosilicate glass wear is used in microwave oven because

A) It is not brittle B) It is highly heat resistant
C) It cooks faster than any other vessel D) It is energy efficient
 
Answer & Explanation Answer: B) It is highly heat resistant

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Q:

The spring balance works on the principle of __________

A) Boyle's Law B) Hooke's Law
C) Bernoulli's principle D) Pascal's Law
 
Answer & Explanation Answer: B) Hooke's Law

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Q:

What is the unit of the physical quantity Entropy?

A) watt per kelvin B) newton per kelvin
C) pascal per kelvin D) joule per kelvin
 
Answer & Explanation Answer: D) joule per kelvin

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Q:

In the equation of motion 2as = v2 - u2, s represents _________________.

A) speed B) displacement  
C) velocity D) acceleration
 
Answer & Explanation Answer: B) displacement  

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Q:

A broadcasting station transmits waves with a frequency of 71 x 104 Hz and a speed of 3 x 108 m/s. The wavelength of the wave is

A) 324.6 m B) 422.5 m
C) 208.4 m D) 418.8 m
 
Answer & Explanation Answer: B) 422.5 m

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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  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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