If human population growth rate is constant at say 1.5%, what does this mean for the associated increase in numbers of people? what does "the j-curve" mean in this context?

Why did macarthur want to invade china? why did truman oppose this?

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

Deep-ocean and are created by convergent boundaries of an ocean and continental crust