Answer: when the death rate is equal to the birth rate the population growth is zero that means there is no increase and decrease of population in that particular year.
Answer:
This is a very interesting question!! I'm assuming this is from physics. The answer: Kelvin's weight would change between planet x and planet y, because weight is defined as the forcce exerted by gravity. IT's different from mass. Weight changes depending on where you are.
Hope this helps!!!
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