Copernicus's heliocentric model and ptolemy's geocentric model were each developed to provide a description of the solar system. both models had advantages that made each an acceptable explanation for motions in the solar system during their time.
sort each statement according to whether it is an advantage of the heliocentric model, the geocentric model, or both.
drag the appropriate items to their respective bins.
planetary orbits and motions based on greek ideologies of perfect form and motion
predicted planetary positions accurately over relatively short time periods
explained planetary motions and brightness changes most simply
rooted in widely accepted religious beliefs regarding earth's place in the universe
heliocentric:
geocentric:
both geocentric and heliocentric:

There is a theory that indicates that dinosaurs became extinct when about 65 million years ago, a large asteroid hit the earth surface. dust caused by this collision blocked the sunlight reaching the earth's surface and many forms of life became extinct due to the cold. fearing this threat, how large the radius of an asteroid should you be looking for if the dangerous asteroid size is approximately the same as the one that killed the dinosaurs? available data suggests that about 18% of that asteroid's mass ended up as a dust spread evenly over earth after eventually settling out of the upper atmosphere. about 0.0180 g/cm^2 of dust, which is chemically different than the earth's rock, covered the earth's surface. typical asteroids have a density of about 1.9 g/cm^3. now that we know the size of the asteroid, how much energy was released during impact, assuming all of it was just the kinetic energy of the asteroid right before the impact?

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

How to calculate voltage drop in a series circuit