Who described atoms as small spheres that could not be divided into anything smaller? bohr dalton rutherford thomson

What are segments of dna that code for a particular trait. a combination of dna and proteins make up what

Arock collection comes from which part of earth?

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?