ന്യുക്ലീയര്‍ ഫിസിക്സിന്‍റെ പിതാവ് ആരാകുന്നു?

Who invented the first “Artificial vocal cords”  that return to those who lost it?

The King of chemicals is :

What are Sun spots ?

When the speed of a moving object is doubled, its :

What is the Unit of measurement of depth :