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

Divide by 273
Add 273
Multiply 273
Subtract 273

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Physics
Pressure Cooker cooks faster because

The material of the cooker is a good conductor
It cooks the food at low pressure
Higher temperature is attained for cooking
Boiling point decreases with rise of pressure

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Physics
'Mirage' is an example of

Refraction of light only
Refraction and total internal reflection of light
Dispersion of light only
Total internal reflection of light only

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