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
Options: was one of the greatest Sanskrit poet and dramatist, lived during the region of Chandragupta Vikaramaditya, famous works include Shakutala, Raghuvansha, Meghdoot and Kumara Sambahava, All of the above
Options: the creation of oceanic crust and the drifting of continents, the convention currents within the earth's mantle cause the creation of new oceanic crust at the mid oceanic ridges, that the oceanic crust is destroyed at areas where this crust type becomes subducted under the lighter continental crust, All of the above
Options: payment by government for purchase of goods and services, payment made by business enterprises to factors of production, payment made by companies to shareholders, payment made by the government to business enterprises, without buying any goods and services
The Manhattan Project was started by President Roosevelt in 1942 to ensure that the U.S. beat the Germans in developing a nuclear bomb. Whom did Roosevelt appoint as scientific head the Manhattan Project?
Options: Robert Oppenheimer, James B. Conant, Leslie R. Groves, Vannevar Bush