Physics
Which of the following experiments analyzed the Fraunhofer lines of the solar spectrum?

Geiger and Marsdens experiment on scattering of alpha particles
Lamb-Rutherford experiment
Bunsen and Kirchhoff's experiment
Barkla's experiment on scattering of X-rays

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Physics
Pressure Cooker cooks faster because

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

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