It is easier to roll a barrel full of coal tar than to pull it because
Options: the full weight of the barrel comes into play when it is pulled, the rolling friction is much less than the sliding friction, more surface area of the barrel is in contact with the road when it is pulled, coal tar is a liquid and it flows in the barrel when it is rolled
The periodic rise and fall of the sea level on the earth, gives rise to tides. This is related to
Options: the position of the moon with reference to the earth and the gravitational pull exerted mainly by the moon and partly by the sun, infrared rays from the sun, ultraviolet rays from the sun, None of the above
Which of the following agencies related to the United Nations is concerned with promoting the growth of international trade and equilibrium in balance of payments?
Options: United Nations Industrial Development Organisation, International Development Association, International Bank for Reconstruction and Development Organisation, United Nation Development Programme
Nowadays many novel chemicals are being synthesized termed as xenobiotics. The unique feature of these is what they are biodegradablenon- biodegradablepose on environmental threatthey are environment friendly