To calculate the dashed orbits from the stellar positions, astronomers had to assume that

What are similarities and differences between refraction, reflection, diffraction and absorption?

The softest and hardest minerals are: softest hardest

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.