Who among the following is the author of the book

Two layers of a cloth of equal thickness provide warmer covering than a single layer of cloth with double the thickness. Why? 

Which of the following is a water-soluble vitamin?

In Bernoulli's principle, increase in fluid velocity leads to:

Division of Agricultural Meteorology at Pune was established in:

If ice floating on water in a vessel melts, the water level in the vessel     .

Which of the following is used to initiate nuclear fission?

Sound waves in air are:

What principle/law explains the working of the hydraulic brakes in automobiles?

Which of the following is Vitamin-E?

With the increase of the effective nuclear charge, the size of the atom or ion