On what bases are galaxies classified? a) density and volume b) mass and temperature c) shape and structure d) temperature and size

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created or , but it can be

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

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?