2 balls start our moving to the right with constant velocities of 5.0 m/s and 4.0 m/s. The slow ball starts first and other 4.0s later. Determine the position of the balls when they meet.

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=

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Elements with high atomic numbers tend to more electrons than protons more electrons than neutrons more neutrons than protons more protons than electrons