It takes much longer to cook food in the hills than in the plains, because
Options: in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time, due to low atmospheric pressure on the hills, the water boils at a temperature higher than 100oC and therefore water takes longer to boil, in the hills the atmospheric density is low and therefore a lot of heat is lost to the atmosphere, in the hills the humidity is high and therefore a lot of heat is absorbed by the atmosphere leaving very little heat for cooking
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: One of the important parties in USA, the political parties which has no definite principles, the political party which changes with the change in the times and circumstances in the country, All of the above
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