Which of the following could be effectively used to reduc...
Which of the following could be effectively used to reduce friction?
kerosene
grease
water
petrol
Correct answer is B
grease is more viscous than the rest of the liquids
When an air column is set into vibrations, the distance between two consecutive nodes of the resulta...
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If the box is pulled from P to Q, which of the following expresses the velocity ratio of the incline...
The sensitivity of a thermometer is ...
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