Science For You

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Science

What is the temperature equal to 273 degree Kelvin?
0 degree centigrade

Who was the first philosopher to use sundial?
Anaxy Mander

Which was the fuel used in the first atomic bomb?
Uranium-235

Deuterium is the natural isotope of which element?
Hydrogen

Which instrument is to measure the force of electric current?
Ammeter

What is the voltage in the domestic electricity supply line?
230 volts

What is the commercial unit of the electric charge?
K.W.h.

Who is the inventor of the atomic theory?
Democratis

What is the speed of light?
300000 Km/second

Who proved that light travels faster than sound?
Olace Romer

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Science

What is the use of a Hypsometer?
For measuring altitudes

In what from does the sound waves travel in air?
Longitudinal waves

Hydrogen bomb is based on which phenomenon?
Nuclear fusion

Which is the colour that absorb all light waves?
Black

Which metals used in solar battery?
Germanium, Silicon and Celinium

Who proved first that there is a medium of ether everywhere in the universe?
Aristotle

Which part of our body does radiation harms the most?
Marrow in the bone

Which is the colour in the center of a rain bow?
Green

Which is the liquid used in Volta cell?
Diluted Sulphuric acid

Name the scientist who invented that the gases in the atmosphere absorb heat coming from the sun?
Joseph Fourier

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Science

What is the distance between broad gauge railway tracks?
1.676 metre

What is the distance between metergauge railway tracks?
1 metre

Which is the metal that reflects the light rays most?
Aluminium

Who was the frist to create artificial vacuum?
Torry selli

Name the scientist who gave leadership to the first atom bomb experiment of India?
Dr.Raja Ramanna

Which is the isotope that is used to determine the antiquity of very old objects?
Carbon-14

How many degree Fahrenheit makes 0 degree centigrade?
32 degree F

What is the full form of NMR scanning?
Nuclear Magnetic Resonance Scanning

Who was the first to make electric magnet?
Willing Sturjor

Which was the first city destroyed by nuclear explosion?
Hiroshima

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Science

Which device is used to escape at the time of a plane accident?
Parachute

What is the length of “ nautical mile?
About 2025 yards, 1852 metres

Which is the device that changes light energy into electric energy?
Photo electric cell

What is absolute zero (The temperature at which the atom of a matter becomes still)?
-273degree centigrade or 0 degree K

Which thermometer is used to fine continuous changes in temperature?
Thermo electric thermometer

What is the most important advantages of sodium vapour lamp?
It requires less electricity

When heated, a material attaining gaseous state directly from solid state. Which is the freezing point of a liquid?
Cryoscope

Why does a straight stick seem to be curved in water?
Because of diffraction

It is the characteristic of liquid drops to be in spherical shapes. What is its reason?
Surface tension

Which is the glass that darkness in sunlight and lightens in darkness?
Photo chronic glass

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Science

When we see movie how many pictures are falling on the screen in a second?
24-39 pictures

Which instrument is used for measuring variations in the gravitational field in different parts of the earth?
Gravimeter

Which instrument is used for measuring the humidity of air?
Hydrometer

Who made the first ever parachute jump?
Jaqres Garnerin, in 1797

What is the law contained in the working of rockets?
Newton’s Third Law of Motion

What is the scientific name of “Photostat”?
Xerography

Who invented Xerography?
C.F.Carrison

Is melting if ice, a chemical change or physical can not be changed into liquid form?
Ideal gases

Pascal is the unit of what?
Pressure

Who started the publication of “Indian Journel of Physics?
C.V Raman

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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

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Science

Which is the metal through which X-ray does not pass?
Lead

Which is the vtamin produced in our body by ultra violet rays in the sun?
VitaminD

Which is the unit for measuring the intensity of sound wave?
Decibel

Which scientific principle has been used in the brakes of vehicles?
Friction

What is the basic principle behind submarines?
Principles of buoyancy of Archimedes

Which device is used in atomic reactors to increase the velocity of ions?
Cyclotron

Who invented Cyclotron?
E.O.Lawrence

Sound is not heard in the moon. Why?
There is no atmosphere in the moon

In the German Silver (an alloy) how much silver is present?
Zero percentage

9What is the use “anemometer”?
It is used for measuring the speed of airflow


Why is there a loud explosion when electric bulb bursts?
Because air rushes suddenly into the vacuum space of the bulb