Which of the following is the best statement for a velocity? A 40 km/hr B 50 km/hr southwest C 30 meters per second D 60 miles per hour E 30 km at 45° north of east

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics