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
Benjamin Franklin was a prolific inventor. He invented the lightning rod, the Franklin stove, studied electricity, discovered the Gulf Stream, started the first library, and on and on. Among his many other inventions, what musical instrument did he invent?
Options: international agreement signed in 1947 between non-communist nations with the object of encouraging international trade unobstructed by tariff barriers, agreement which seeks to achieve its aim by arranging and encouraging bargaining with trade concessions between members, Both option A and B, None of the above
Which of the following geographical features have played a great unifying role in strengthening the forces of homogeneity of the Indian people?The expanses of water surrounding the peninsulaThe Himalayan MountainsThe vastness of the countryThe presence of the Indian ocean