A500n person stands in an elevator that is moving downward at constant speed. the force that the floor exerts on the person must be a) 500n upward b) 500n downward c) less than 500n upwards d) less than 500n downward

What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics

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=

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?