Science

Name the Scientist who launched rocket for the first time on experimental basis?
Robert H Godard

At which temperature does water have the maximum density?
4 degree centigrade

If blue light and yellow light are mixed on a screen what will be the resultant colour?
Green

Which alloy is used to bore rock?
Manganese steel

Which instrument is used to detect the presence of electric charge?
Electroscope

What is the use of Planimeter?
For mechanically measuring the are of a plane figure

What is the name of the sound having frequency more than 30000 hertz?
Supersonic

Who was the first to develop battery which produce electric charge?
Alexandro Volta

Which is the device used for testing the concentration of sugar in a solution?
Saccharimeter

Albert Einstein got Nobel prize in 1921for Physics on a treatise Which was the subject?
Photoelectric effect