A 1kg block on a frictionless path starts at rest and is released on the path. At the top of the path, the block obviously has GPE, how much GPE does it have at point A when it starts at rest?

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

Gas cloud 1 is likely to form a star. gas cloud 2 is not. based on this information, match the given conditions with each cloud

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?