Which statement best describes an atom?

a protons and neutrons grouped in a specific pattern

b protons and electrons spread around randomly

c a group of protons and neutrons that are surrounded by electrons

d a ball of electrons and neutrons surrounded by protons

The slope of a good speed time indicates ? a. velocity b. acceleration c. direction d. speed

The harmonic motion of a particle is given by f(t) = 2 cos(3t) + 3 sin(2t), 0 ? t ? 8. (a) when is the position function decreasing? (round you

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.