Which describes the relationship between the frequency, wavelength, and speed of s wave as the wave travels through different media?

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

As you watch a surfer ride a wave towards the shoreline, what is the shoreline? a) displacement reference b) reference point c) coordinate plane d) cartesian boundary

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.