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What is the SI unit of Energy ?

Joule
KG
Meter
Kelvin

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It is named on a scientist 'James Prescott Joule'. Joule is also the unit of work as energy is defined via work.

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What is the main constituent of natural gas ?

Methane
Oxygen
Water
Nitrogen

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Identify the symbol ?

lamda.png
Alpha
Beta
Gamma
Lamda

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Which of the subatomic particle carries a negative electric charge ?

Proton
Neutron
Electron
Pion

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It is found arranged in quantum mechanical orbits about neutral atoms. The electron is a lepton, and therefore has lepton number 1. The antiparticle of the electron is called the positron. The electron mass is 9.1095 X 10-31 kg, and the electron charge 1.6022 X 10-19 C.

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Identify the symbol ?

Ohm.png
Alpha
Ohm
Wavelength
Gamma

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It is the SI unit of electrical resistance.

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Carbon dating is used for what ?

To produce a solution with carbon as solute
To estimate the age of organic materials
To change the carbon in other organic material
To produce conductors

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How is the age of a tree determined ?

Annual rings count
Leaves count
Branches count
Roots count

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These rings can be counted to determine the age of the tree, and used to date cores or even wood taken from trees in the past. This practice is known as the science of dendrochronology.

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Which is a renewable source of energy ?

Petrol
Diesel
Solar
Kerosene

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Renewable energy is a energy that generates from natural resources. These are called as so because they are supposed as never ending resources of energy.

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Which metal has the highest melting point ?

Platinum
Rhenium
Tantalum
Tungsten

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Of all metals in pure form, tungsten has the highest melting point (3,422 °C, 6,192 °F), lowest vapor pressure and (at temperatures above 1,650 °C, 3,000 °F) the highest tensile strength.

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Which has the highest electrical conductivity of any element and the highest thermal conductivity of any metal.

Copper
Gold
Lead
Silver

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Silver(Ag) is a soft, white, lustrous transition metal. Most silver is produced as a by-product of copper, gold, lead, and zinc refining.

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