_________ says that the marginal product of a factor input initially rises with its employment level. But after reaching a certain level of employment, it starts falling.
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The number of neutrons present in a nitrogen atom is ___.
Which among the following is not an environment friendly mode of producing electricity?
The ____ of a substance is defined as the mass per unit volume.
Green House Effect' means
Which among the following is NOT an event during the photosynthesis process?
June 21 marks the winter solstice in the _________ Hemisphere.
What is the minimum age to become the Prime Minister of India if he or she is a member of Rajya Sabha?