What is 550cm in meters. show the work

The heliocentric and the geocentric models of the solar system included these central principles

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

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring