It is easier to roll a stone up a sloping road than to lift it vertical upwards because
Options: work done in rolling is more than in lifting, work done in lifting the stone is equal to rolling it, work done in both is same but the rate of doing work is less in rolling, work done in rolling a stone is less than in lifting it
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
Options: make the taste of food better, produce in small amounts the hydrochloric acid required for the digestion of food, ease the process of cooking, increase the solubility of food particles in water
Mica is used in electrical appliances such as electric iron because mica is
Options: a good conductor of heat but a bad conductor of electricity, a bad conductor of heat but a good conductor of electricity, a good conductor of heat as well as electricity, a bad conductor of heat as well as electricity