What was the main idea of Malthus theory of population

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up