Find the quantity of methods of picking 4 cards

The loudness of the sound depends upon 

‘Therm' is the unit of –

Electrical fuse is used to interrupt excess of _________.

Temperature of the Sun is measured by

Which atmospheric layer contains ozone layer?

Which pioneer of the late 19th century is credited with using radio waves for signal transmission over several kilometers?

For which type of motion, the distance time graph is not a straight line and can be any kind of curve?

What is the device used to amplify and modulate microwave frequency signals called?

How much calorie of energy is released by a boiled egg?

What is the SI unit of G — the universal gravitation constant?