1 BTU(British thermal unit) is equal to___________?

1 light year = ?

1 yard =___________?

1 nanometer = ?

746 watts are equivalent to_____________?

A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?

A body of land that is surrounded by water on three sides is called________?

A branch of medicine dealing with eyes and related diseases is called_________?

A camera uses a __________ to form an image.

A clouding that develops in the lens of the eye or in its envelope obstructing the passage of light is known as________?

A colloidal system in which a liquid is dispersed into a liquid is called_________?

A common skin condition that causes skin redness and irritation is known as_________?

A convex mirror always ___________ ?

A device that converts mechanical energy into electric energy is called_______?

A device which converts chemical energy into electrical energy is called __________?