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Physics

Physics
Which of the following produces more severe burns ?

Boiling water
Melting iceberg
Steam
Hot water

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Physics
Solar energy is due to

Combustion reactions
Fusion reactions
Chemical reactions
Fission reactions

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Physics
Choose the most appropriate answer: Sir CV Raman was awarded Noble Prize for his work connected with which of the following phenomenon of radiation?

Scattering
Polarization
Diffraction
Interference

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Physics
To convert temperature from Celcius to Kelvin scale, you must ________ the given temperature.

Subtract 273
Add 273
Divide by 273
Multiply 273

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Physics
What type of lens is a magnifying glass?

Diverging
Achromatic
Spherical
Converging

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Physics
Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes

3R/4
2R
5R/4
R/2

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