20 men can do a piece of work in 14 days working 9 hours

Which Instrument is used to measure depth of ocean?

Cell was discovered by

‘Therm' is the unit of –

What is the colour of neutral wire?

1) Red

2) Green

3) Black

4) Yellow

Which Metal is found in the highest proportion in earth’s crust?

The method of transfer of heat in liquid is

Which of the following Instrument is used to measure humidity?

Which type of mirror is utilized in solar furnaces to focus sunlight and generate heat?

Sound of frogs can be heard from a long distance in a rainy season because

The instrument for measuring intensity of earthquakes is called –