Which of the following observations proves that the Earth goes around the Sun and not vice versa? Why were the other observations important discoveries that helped persuade people that the Earth does go around the Sun, along with all the other planets? A. Phases of Venus. B. Moons of Jupiter. C. Sunspots and mountains on the Moon. D. Stellar parallax. E. Retrograde motion.

In 1995 a research group led by eric cornell and carl wiemann at the university of colorado successfully cooled rubidium atoms to the 20-200 nk temperature range. assuming (incorrectly) that the rubidium atoms behave liké particles of a classical ideal gas, calculate the rms speed of a rubidium atom at a temperature of 112.0 nk. in the experiments one particular isotope of rubidium was used, rubidium-87. the molar mass of this isotope is 86.91 q/mol. tries 0/20 submit answer

Which changes of state do the labels represent? a: b: c:

What are the three ways that an object can accelerate