Can a pillow have kinetic and potential energy explain how and why ?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as

#20 which type of bond is formed when bases pair in dna? ionic bond covalent bond coordinate bond hydrogen bond