Which best describes the motion of air particles when a transverse wave passes through them?

a.
the particles move both perpendicular and parallel to the direction of the wave.

b.
the particles follow the motion of the wave.

c.
the particles move perpendicular to the direction of the wave.

d.
the particles move together and apart parallel to the direction of the wave.

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

What are similarities and differences of reflection, refraction, diffraction and absorption?

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.