Which has the least gravitational potential energy?
a 25 kg barbell being held above the head of a weightlifter
a 10 kg barbell resting on the floor

Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted

Compare and contrast physical changes with chemical changes.

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.