Select the most appropriate ANTONYM of the given

How much time does a Geostationary satellite take to complete one orbit, at the height of 35790 km?

Quantum Theory was discovered by?

I threw a ball horizontally on the road and after covering certain distance, the ball stopped due to

The apparatus used in the refrigeration is

The SI unit of electric current is:

The waves which are less than 20Hz are known as 

Mercalli scale is the instrument used for measuring the intensity of ___________.

Which of the following is the best fire-extinguisher?

With reference to the types of electromagnetic waves, consider the following statements:

The device used for locating submerged objects under sea is –