What is the largest common divisor of the numbers 1026,

The method of transfer of heat in liquid is

In the atmosphere ultraviolet rays are absorbed by –

The splitting up of white light into seven colours on passing through a glass prism is called as

The instrument which uses sound waves to measure the depth of oceans is –

The Doppler Effect primarily refers to changes in what aspect of waves?

If input frequency of a full wave rectifier be n, then output frequency would be-

Which of the following liquids has the least density?

The waves which are less than 20Hz are known as 

The method of transfer of heat in liquid is

Which compound is used to prepare water proof clothes?