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
Calculate the energy required to vapourise 50g of water initially at 80oC.[specific heat capacity of...
Which of the following statements about a moving object is correct? ...
A uniform light rod is kept in horizontal equilibrium under the influence of fore forces as shown ab...
A magnified and virtual image of a near object is produced by ...
Vapour is said to be saturated on top of an enclosed liquid if _________ ...
An aluminum foil is placed across a beam of radiation from a radioactive source. Which of the follow...
A given mass of gas at a temperature of 30°C is trapped in a tube of volume V. Calculate the temper...
A loaded test-tube which floats upright in water is carefully and slightly depressed and then releas...
When a box of mass 45kg, is given an initial speed of 5ms-1 it slides along a horizontal floor a dis...
A 50kg block is dropped from a point 10m above as shown in the fig above. if the force constant of t...
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