.) Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity. a.) Vector, scalar, scalar
b.) Vector, scalar, vector
c.) Scalar, scalar, vector
d.) Scalar, vector, vector

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

Mark creates a graphic organizer to review his notes aboutelectrical force.which labels belong in the regions marked x and y?