Questions

A body is initially moving with a velocity of 10 m/s. It undergoes an acceleration of 2 m/s2 for 5 seconds. Find the displacement (in m) of this body in these 5 seconds.

In the following question, select the missing number from the given series.1 108, 81, 54, 27, ?

Which of the following ratios can be the ratio of the sides of a right angled triangle?

Who is the author of Manimekalai?

Who is considered the greatest of the early Chola Kings?

If 1 x 3 x 5 = 1925 and 7 x 9 x 11 = 4981121 , then find the value of 19 x 21 x 23 = ?

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.

to break up into small parts as the result of impact or decay

Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.

Crude mineral oil comes out of the earth as a thick brown or black liquid with a strong smell. It is a complex mixture of many different substances, each with its own individual qualities. Most of them are combinations of hydrogen and carbon in varying proportions. Such hydrocarbons are also found in other forms such as bitumen, asphalt and natural gas. Mineral oil originates from the carcasses of tiny animals and from plants that live in the sea. Over million of years, these dead creatures form large deposits under sea­bed and ocean currents cover them with a blanket of sand and silt. As this material hardens, it becomes sedimentary rock and effectively shuts out the oxygen, thus preventing the complete decomposition of the marine deposits underneath. The layers of sedimentary rocks become thicker, and heavier. Their pressure produces heat, which transforms the tiny carcasses into crude oil in a process that is still going on today.

The time taken for the marine deposits to harden into rocks is