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Common Observations
Police use dogs for detective work? Because _____
They have sharp eyesight
They can run very fast
They can hear ultrasonic waves
They are easily trainable
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Common Observations
The dress made out of which of the following materials is safe to wear while cooking?
Silk
Cotton
Nylon
Terelene
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rikazzz
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Common Observations
When a vehicle passes, TV reception gets distorted. This is because:
Metal reflects radio waves
Spark plug creates electromagnetic disturbances
Passing vehicle affect the sophisticated T.V. components
None of these
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rikazzz
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Common Observations
Tiredness is felt on the top of the mountains because of:
High temperature
Low temperature
Low pressure outside the body
High pressure outside the body
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rikazzz
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Common Observations
If you float on your back, on water, your weight will be:
Less than the weight of water displaced by you
Half of your normal weight
Zero
Equal to your normal weight
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rikazzz
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Common Observations
Why is the light of ordinary lamp hotter than the tube light?
It is due to incandescence
It gives white light
It has more surface for distribution of energy
It is due to ionization of gases
Author:
rikazzz
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Common Observations
Water is a highly effective coolant for a car engine because:
Water is good conductor of heat
Water has very high specific heat capacity
Evaporation of water produces lot of cooling
None of these
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rikazzz
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Common Observations
Clothes keep us warm in winter because they:
Supply heat
Do not radiate heat
Prevent the heat of the body from escaping
None of these
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rikazzz
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Common Observations
Moon has no atmosphere because:
It is quite for off
It does not have any living being
Its surface is not smooth
Root mean square velocity of all gases is more than their escape velocity on moon’s surface
Author:
rikazzz
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Common Observations
The stars twinkle in the night because:
They emit light intermittently
The star’s atmosphere absorbs light intermittently
The refractive index of the air in atmosphere fluctuates
The earth’s atmosphere absorbs light intermittently
Author:
rikazzz
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