A5.00 kg crate is on a 21.0° hill.
using x-y axes tilted down the
plane, what is the y-component
of the weight?
(unit = n)

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=